Revert "Merge branch 'doc' of https://github.com/shkesar/JAdventure into shkesar-doc"

This reverts commit f51286ad0715e105959082a850858b97f8a322a0, reversing
changes made to 55dbb14fa0a621051420e494f1396e595455e8df.
Menu documentation again.

Conflicts:
	src/main/java/com/jadventure/game/menus/DebugMenu.java
	src/main/java/com/jadventure/game/menus/Menus.java