Reported by: @maneco2

+ Drop Invicible effect
+ Drop Petrification effect

+ Add BlockBuff effect
+ Add BlockDamage effect
+ Add BlockDebuff effect

+ Fix Arena Buffer skills (only few appear on player)

+ Improvement skill validator
+ Add/Remove some stats form skills to be more retail.

- Improvement wrong drop for npc id "20552"
- Updated Lv 83 to Forgotten Scrolls High Five
- Updated Skills/Forgotten Acquisition Level
- AutoLearnForgottenScrollSkills = True at the correct level
- Updated Skill Acquisition SP
- Add missing skill High Five Skill Acquisition
- Reorganized Skill Acquisition by Level

A long time ago i had opened this Pull Request -->
https://github.com/L2J/L2J_DataPack/pull/152
I closed because it lacked the part of retail droplist for Forgotens
Scrolls Lv 83, right now done.

They is not used anymore.
Update xsd file with enum for <set name=?

Moving all files to main folder.
Using Gradle to define, manage dependecies and build the project.
Upgraded Gradle wrapper.

L2J/L2J_Server@066ce70b2ebf1dea87c8c07f71021cf94afa822e

L2J/L2J_Server@2d6af28bc61162a76d37f74e529e922c9c76f446

BETA: Removing double olympiad check from skills, now is managed by '''blockedInOlympiad''' boolean.

	* `ArmorType`, `EtcItemType` and `WeaponType` inside xml to upper case
		* Patch by: Nos
Reviewed by: Nos, !UnAfraid
	

	* Minor cleanup and formatting.

Patch by: malyelfik
Reviewed by: jurchiks, Zoey76

'''Note:''' High Five feature.

	* Implemented all "level display" skill for raid bosses.
	* Added missing item consume ID for some items.
	* Implemented Soul Retain skills for Ekimus raid boss.

	* Fixed time in Dragon Dash (20004).
		* Patch by: u3games
	* Fixed time in Dragon Aura (20005).
	* Fixed skills end effects updated in High Five for skills:
		* Anchor (1170)
		* Lightning Shock (791)
		* Lightning Strike (279)
		* Reported by: maneco2, Gries, janiko

	* Moved abnormal visual effects from effect to skill.
	* Added missing !JavaDocs.
	* Removed unused `L2EffectType`.
	* Removed `L2AbnormalZone`, instead use `L2EffectZone` with a custom skill.
	* Added all missing abnormal visual effects.
	* Fixed/removed all custom abnormal visual effects.
	* Removed hardcoded abnormal visual effects, they must be present in skill or set to the character.
	* Added fixed all values for abnormal visual effects.
		* Thanks to: Nos
	* Fixed abnormal visual effect admin menues.
		* Added event abnormal visual effect menu, although they are not working yet.
	* Removed multiple methods to start/stop abnormal visual effects.

Reviewed by: !UnAfraid

Patch by: Nos, Adry_85
Reviewed by: Zoey76, !UnAfraid

	* Renamed `L2Effect` to `AbstractEffect`.
	* No more dynamic creation of effects (Huge performance and memory boost!).
		* Removed all traces or reflection on run time!
	* Removed `EffectTemplate`, merged with `AbstractEffect`.
	* Reworked and externalized all the logic from `AbstractEffect` that handled effect ticking.
	* Reviewed all "over time" skills:
		* `Flag` effect does not have ticks and doesn't need onActionTime() defined.
		* '''Fixed DOT (damage over time), MDOT (mana damage over time), HOT (heal over time), MHOT (mana heal over time) skills.'''
			* Reported by: Tavo22, Snip
		* `FakeDeath` effect should only last forever (or while conditions are met) if it's a toggle skill.
		* `Relax` effect should only last forever (or while conditions are met) if it's a toggle skill.
	* Removed `EffectState` enumerated and the nasty switch associated to it!
	* Removed "lambda" support from effects, the default attribute `val` is now double.
		* Removed val="0", now `val`'s default value is zero, no need to declare it explicitely.
	* '''Removed''' `noicon` '''attribute from effects, icon is not related to effects, but to the skill.''
	* Renamed `AbnormalEffect` enumerated to `AbnormalVisualEffect`.
	* Removed `EffectDurationHolder` DTO.
	* Removed getFirstEffect(int), skills can be stoped by skill ID or `AbnormalType`.
	* Reworked (again) `CharEffectList`:
		* Using maps as underlying implementation, '''reduced drastically iterations''' (Hash tables offer 0(1) in most operations).
			* Using Javolution's `FastMap`, due Java lacks a default implementation that is ordered by insert order, thread-safe and concurrent safe.
		* Separated all kind of skills into buffs, triggers, dances, debuffs, passive.
		* Using Double-locked checking, useless instantiation of maps is avoided.
		* Improved buff counting operations (no more iterations over every effect every time you get a new one to know if you reached maximum count).
		* Removed getEffects() and all temporary list/map creations.
		* '''Reworked the way buffs are inserted preventing iterations and correcting exceptions while finding the correct index to insert the buff.'''
	* Reworked `Formulas`#calcEffectAbnormalTime(Env env)
	* Fixed `L2CubicInstance`#useCubic<Skill Type>(..), this methods are not static, then they don't need to recieve a `L2CubicInstance` as parameter.
	* Implemented `BuffInfo`, modeled from retail's implementation with minor changes to fit our implementation.
		* Complex DTO that holds all the information for a given buff (or debuff or dance/song) set of effects issued by an skill.
		* Controls the logic of the buffs.
	* Removed a few of `L2EffectType`.
	* Improved a bit `L2BabyPetInstance` skill casting related logic, reduced iterations and simplified the code.
	* Implemented `EffectTaskInfo`, DTO to hold the effect task (Maybe this will change later).
	* Implemented `EffectTickTask` runnable task to control ticking logic.
	* Removed "after effect" implementation, totally useless.
		* Suggested by: UnAfraid
	* Removed all the `L2Skill`#getEffects(..) methods replaced with L2Skill#applyEffects(..).
	* Moved "can be stolen" logic to `L2Skill`, it isn't related to the effect, but to the skill.
	* Added "Refresh" button on admin panel to check buffs easily.
	* Added admin command "admin_getbuff_ps" to check effects from passive skills.
	* Improved performance in `DispelBySlot` and `DispelBySlotProbability` effects.
	* Fixed minor typo in `DispelBySlot` and `DispelBySlotProbability` effects, there are values over `Byte.MAX_VALUE`.
	* '''Added retail support for Herbs, when a lesser buff is replaced by an herb, it becomes inactive, but it's timer continues, when the Herb buff finishes if the lesser buff has time it becomes active untill completes it's time.'''
		* Time does not pause, it just continues in the background.
		* Effects does not stack.
		* Reported by: Nos
	* '''Fixed Herbs, they shouldn't display gauge bar (casting bar) upon usage.'''
		* Reported by: Nos
	* '''Fixed Herbs not removing lesser effect icon, leading to players belive that buffs stack...'''
		* Reported by: Tavo22, evets, u3games, pandragon
	* '''Fixing instant effects being added to the effect list, and removing buffs present on the list.'''
		* Reported by: Tavo22
	* '''Fixed "Short Buff" slot (slot for healing potions).'''
		* Statified reset packet (reduced object creation, a lot!).
		* Removed task to reset `ShortBuffStatusUpdate`, let's use buff ending task for that.
		* Moved logic to `CharEffectList` instead of `L2PcInstance` + `ItemSkillsTemplate`.
		* Reported by: JMD, Gries, Cresceus
	* Fixed `StealAbnormal` effect logic and `Formulas`#calcCancelStealEffects(..).
		* Improved buffs doesn't stack anymore with normal (lesser) buffs.
		* Now all effects are excecuted including instant effects (if they are successfuly applied).
		* Reported by: Adry_85
	* `BlockChat` effect shouldn't be instant!
	* Fixed system messages related to skills (success, fail, removal, ending).
	* Improved `AdminBuffs`, more information is displayed:
		* Blocked abnormal skill types (if any)
		* Total buff count.
		* Hidden buff count.
		* Inactive effects (in red)
		* Skill level next to the name.
	* '''Rewritten''' `EffectMasterHandler` '''to avoid reflection where it's useless.'''
	* Since `L2EffectType` is scheduled to be removed:
		* `AbstractEffect`#getEffectType() is not abstract anymore, now returns L2EffectType.NONE by default.
	* '''Fixing debuffs working on "white players" with control.'''
		* Patch by: nBd (minor changes by Zoey76)
		* Reported by: plasan, jungla56, St3eT, Tavo22, Konstantinos, pandragon
	* '''Fixed exploit on restore summon feature that allows players to dupe summons.'''
		* Unhardcoding `canSummon` condition.
		* Reported by: Janiko
	* '''Fixed Arcane Shield getting stuck after being stolen.'''
		* Reported by: valanths1990, nBd, freestyler, Gries
	* '''Fixed triggered skills that got stacked within the same ID and different level.'''
		* Reported by: nBd, lucan, blacksea, Gries

Tested by: Nos, Captain, Janiko, Konstantinos, Lucan, UnAfraid, Zoey76

'''Note to developers 1:''' Instant effects shouldn't override onExit(!BuffInfo).
'''Note to developers 2:''' Is not required to call super.onStart() or super.onExit() to add/remove abnormal visual effects anymore, it's done on an indepent method.
'''Note to developers 3:''' Do not add "steal constructor", such thing is not required anymore.

	* Patch by: Tan, UnAfraid, Nos

	* Fixing bug with sweeper effect.
		* Reported by: ccarrion
	Reviewed by: MELERIX, Nos, !UnAfraid, Zoey76

	* Removed old and custom skillTypes and added new effects.
	* Added retail formula for effects '''!TargetCancel''', '''!TargetMeProbability''', '''!SkillTurning''', '''Betray''' and '''Bluff'''.
		* Patch by: Nos
	* Added all missing '''effectPoint''' inside skills.
		* Patch by: !UnAfraid
	* Fixed bug with !TargetMe effect that does not allow you to change target even if the effect has worn off.
		* Reported by: blacksea
Reviewed by: Zoey76
Thanks to: Nos, !UnAfraid, Zoey76

	Reviewed by: UnAfraid

	* Also fixing typo in skill 2274 it have 8 levels not 9!

	* Added missing magic levels for enchanted skills.
	* Removed duplicated magic levels.
	* Fixed wrong magic levels, the rest will be done in following commits.
	* Fixed some passive effects, stats should't be added with out a wrapper effect!

	* Continuing with [9752].

	* Minor cleanup.

	Reviewed: !UnAfraid

	* Removed '''!TransformDispel''' skillType.
	* Added two new conditions '''!CanTransform''' and '''!CanUnTransform'''.
	* Fixed bug that you can spam transformation skills when you ride a pet.
		* Reported by: takhs7
	* Added some new skills:
		* '''Blessing of Baguette''' (21042).
		* '''Berserker Spirit''' (21087).
		* '''Blessed Child Transformation Skill - Trejuo''' (21195).
		* '''Blessed Child Transformation Skill - Sujin''' (21196).
Reviewed by: Zoey76

	* Optimized '''calcCancelStealEffects''' in formulas.
	* Merging all '''Cancel''' effectType in one called '''DISPEL'''.
	* Removed '''negateAbnormals''' and '''maxNegated''' from skills xml.
	* '''Cancel''' and '''!CancelDebuff''' effects now are called '''!DispelByCategory''' and are handled with proper parameters.
	* '''!CancelAll''' now is called '''!DispelAll'''.
	* '''!DispelBySlot''' and '''!StealAbnormal''' now is handled with proper parameters.
	* Added new effect '''!DispelBySlotProbability'''.
	* Fixing typo for skill '''Maximum Focus Force'''.
		* Reported by: blacksea
		* Patch by: blacksea
Reviewed by: Zoey76

	* Added new effect NpcKill for Betray skill.
	* Deleted useless skillType.
	* Added new skills:
		* Presentation - Lilith Battle.
		* Presentation - Anakim Battle.
	
	Reviewed by: Zoey76

	* L2PcInstance:
		* Removed isUsingDualWeapon() not used anymore.
		* Removed custom check for Strider Siege Assault skill (new condition will be added soon).
		* Fixed double system message when you use Soul Rage skill.
	* Stats:
		* Removed useless stats (LETHAL_RATE, AGGRESSION_VULN, AGGRESSION_PROF, CRIT_PROF, NONE_WPN_VULN, transformId).
	* !SystemMessageId:
		* Updated system message when you done damage on target.
		* Added missing system message for Seven Signs quests (quests will be added soon).
	* Formulas:
		* Moved calcLethalHit in proper effect handler.
		* Cleanup and fixes some methods.
		* Fixing blow bonus when you hitting from the side of target.
	* L2Character:
		* Removed !CpConsume check and fixed skill Over the Body.
	* L2CubicInstance:
		* Added !CubicDrain method.
		* Removed useless comment.
		* Fixed Magical Critical Rate calculation.
	* L2Skill:
		* Removed staticDamage variable, now have own effect like retail.
		* Removed canBeReflected variable, now have his proper checks.
		* Cleanup and fixes some methods.
	* L2SkillType:
		* Deleted PDAM, MDAM, MANADAM, CPDAMPERCENT, DRAIN, DEATHLINK, FATAL, BLOW, STRSIEGEASSAULT and CHARGEDAM.
	* L2EffectType:
		* Added new effects DEATH_LINK, ENERGY_ATTACK, FATAL_BLOW, HP_DRAIN, LETHAL, MAGICAL_ATTACK, MAGICAL_ATTACK_MP, PHYSICAL_ATTACK, PHYSICAL_ATTACK_HP_LINK and STATIC_DAMAGE.
		* Renamed !IncreaseCharges to !FocusEnergy and made effect retail like.
		* Added new effect !FocusMaxEnergy.
	* Effecthandlers
		* Removed !StatusUpdate from some effect because is already updated by setCurrentHp, setCurrentMp and setCurrentCp methods.
		
	'''NOTE''': New skill debugging will be added soon.
	
	Reviewed by: MELERIX, Zoey76