Reported by: @irlex

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

Reviewed by: Zoey76, !UnAfraid

	* Removed lot of casting.

'''Note:''' If you get errors on your custom scripts after synchronizing, just check and change methods from getXXXId() to getId().

	* Comment fixes will be done later.
	* This is done so new patches won't be so large due new Eclipse settings on save.

	* Proper GPLv3 license.
	* Updated all Java DP files.
	* Added missing license to the following files:
		* !FirstClassTransferTalk
		* !AdminInstanceZone
	* Updated Eclipse preferences for new files (header).
		* ''Same'' settings as Core.

	* Unhardcoding most of skill ids
	* Fixed some typos
	* Added missing system messages
	* Added some TODO: comments
	* Decreasing range of shot skill broadcasts

	* Wondrous Cubic - 1 time use should be consumed upon usage.
	* Added more missing GPL notices.
	* Implemented Calculator item handler.
	* Moved some high time reuses from items skills to it's items, it's a temp fix for missing global skill reuse, since item reuse is global to all classes.
	* Removed custom check based on skill type for Extractable skills with high reuse not being able to be used in sub-classes.

	* Using same Code warning/error configuration than core.
	* Fixed respective warnings and errors.
	* Fixing Extractable Skills restriction properly.
		1. Unhardcode Skills Ids.
		1. Now only Item Skills are restricted.
		1. Items with consume count won't be consumed without giving the reward.
		1. Applied to reuse time greater than 5 seconds, there is no point on restrict item skills with less reuse time.
		1. Unhardcoded system message for item reward.
	* Hellbound fixes:
		1. Hellbound should start closed at server start (level 0), thanks Trev.
		1. Quarry ClassCastException fix.
	* Q290_ThreatRemoval removed unnecessary int cast.
	* Q636_TruthBeyond proper method to get an int.
	* Skill Santa Claus' Gift - Luck(22018) typo fix.

 * Reworked MapRegion system. Moved to xml, an put in spawn locations. Can add banned race for map regions.
 * Added respawn_zones.xml. Respawn locations are defined per race and link to MapRegion by name.
 * Added support for banish respawn locations for Clan Halls, Fortress and Castles
 * Added retail support for other respawn locs (for siege towns)
 * Modified teleToLocation functions for add support to variable randomOffset. (booleans functions use config values, can be replaced with an integer value)
 * Added enum for castles
 * Added function for get random point in area
 * Added retail support for Residence zones (for mass teleporter). Only for castles now.
 * Enabled castle_teleport_zones and removed custom_castle_teleport_zones.
 * If player is in respawn zone, when dies, only appear To Village button

'''NOTE: Require DataPack [L4771]'''

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added support for quest attribute items, thx bloodshed

handler defined inside etcitem table
require [L3107]