Implemented back button in AboutScene

A back button is added and implemented in the AboutScene.java class
Implemented back button in RankingsScene

A back button is added and implemented in the RankingsScene.java class
Implemented back button is BadgesScene

A back button is added and implemented in the BadgesScene.java class. Also some code is modified for the looks
Implemented back button in StartScene

A back button is added and implemented in the StartScene.java class
Removed unused code

The inner class BackButton wasn't used so it is now removed
Removed food and hunger system
New window implemented

The new window has been implemented, with the Hero being able to quit
the game if he is a chicken in the first level.
Removing food and hunger system
Merge branch 'BackButton'
Merge branch 'Hero-Is-A-Chicken'
Merge branch 'RemoveFoodHunger'
Merge branch 'master' of https://github.com/Selech/pixel-dungeon
Merge branch 'Anders'
When moving around it prints "..." to the GLog (console ingame), if there is a secret door.
When moving around it prints "..." to the GLog (console ingame), if there is a secret door."
Merge branch 'Niels'

Conflicts:
	src/com/watabou/pixeldungeon/actors/hero/Hero.java
Merge branch 'BackButton'
Merge branch 'Anders'
Merge branch 'Hero-Is-A-Chicken'
Merge branch 'RemoveFoodHunger'