Added database cleanup file.

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.

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

	* Reworked skill and drop editing for npcs and the whole AdminEditNpc handler.
	* Improved html layout of those functions.
	* Added quick admin command to reload all handlers: !//reload handler
	* Fixing some small sql files typos.
	* Patch by: Nos