DP part of
https://bitbucket.org/l2jserver/l2j_server/commits/a2732ec44345fee96c14c542c54d52922352cc40

- Splitted calcPhysDam formula in two parts, one for normal hit and one
for skills (calcSkillPhysDam).

Reviewed by: Zoey76

DP part for:
https://bitbucket.org/l2jserver/l2j_server/commits/0d6eda511e63f3fd7e53b0f70e80eae8699fa97f

effect handlers).

DP part for:
https://bitbucket.org/l2jserver/l2j_server/commits/22fe4cefcca72a291928d2ddc9701cc3d2b9d706

effect handlers).

DP part for:
https://bitbucket.org/l2jserver/l2j_server/commits/1bbeb09e547e3c116d96ded73a1ca4996d17616c

DP part for:
https://bitbucket.org/l2jserver/l2j_server/commits/6086e154c274b5df07b3961c963f718c3ea307a6

Added Enemy and EnemyOnly target type handlers.
Added support for affect scipe "SINGLE".

Fixes #149
Fixes #107

The following skills can only be used in enemies:
Confusion (2)
Lure (51)
Veil (106)

Fixed Shadow Step (821), now cannot be casted without force on unflagged
characters and flags the caster if used on unflagged characters.
On flagged characters do not need force (CTRL).

Reported by: @FinalDestination

- Fix skill (642) Remove Trap

+ 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.

Core L2J/L2J_Server@869052eb6dc1719e35c42a38e4b6187bd76c70f3

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

Require Core!
@reported by: sahar

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

Reported by: Hindi, darknight666, Driad, u3games

* MaxHp
* MaxCp
Both support diff and per
Fix problem while increase and then regenerate hp
Require core!

Core L2J/L2J_Server@b61658664da9f60585e94983a238429e8c566542

Core L2J/L2J_Server@7c6d77cdd53df8599957353fdcdab9358ae22acc

L2J/L2J_Server@2d6af28bc61162a76d37f74e529e922c9c76f446

This reverts commit 84734844.

L2J/L2J_Server@ac875a3457c8b4af95db2646346cfdb1442be25e

	* Removed the duplication.
	* Simplifying the xsd and making it easy to maintain.
	* Patch by: Battlecruiser

Reported by : malyelfik

  * Challenge for Fate
  * Challenge of Faith
  * Gatekeeper Aura Flare
  
  * skill validator updated.

No commit message

Merge from unstable 2233 back to trunk. Requires core update. Please test and report. Thanks to all those who have helped: Aikimaniac, AllexxM, Fulminus, zerghase..