Added missing copyright notice.

General cleanup.

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

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.

   * Fix TvT problem
   * Missing check for summon + retail message
   * Some protections add
   * Performance improvements
 
   Reported by: momo61
   Tested by: Pandragon, Konstantinos
   Reviewed by: UnAfraid

Reviewed by: Zoey76, !UnAfraid

	* Reviewed by: Zoey76, UnAfraid, Nos
	* Tested by: zatei

	* 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.

- Merged HP/CP Recovery in ArenaBuffs handler
- Arena buffs fix by MELERIX
- Proper bypass handlers exception logging

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