Moved to Maven instead of Gradle.
Using proper project structure and package structure.

Fixed minor typos.

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

* Reviewed by: Zoey76, xban1x

Reviewed by: Zoey76, !UnAfraid

	Reported by: u3games

	- Removed useless target type
	- Added support to affect limit for area skills
	- Replacing !FastList with !ArrayList
	
		Reviewed by: !UnAfraid, Zoey76
		
	- Fixed Chain Heal issue with clan/ally targets
	
		Reported by: oscard
		Reviewed by: !UnAfraid

'''NOTE: Require CORE [L5903]'''

	* 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.

	* Avoiding some '''instanceof''' where it's possible.
	* Format and cleanup.

	* Other warnings will be fixed later.

BETA: Removing backward compatibility for L2Party/L2CommandChannel if you want it skip that changeset thanks Battlecruiser

	* Renamed some method to match it's function.
	* Better Format setting for enums.
'''Note:''' Require [4975].

	* Added missing license to Java files.
	* Cleanup.
	* Set GPLv3 as default header for Java files.