Why bother calling the render function?
Fixes a NullPointerException when typing an invalid command

This fixes an npe that gets thrown when you type an invalid command. For example you have 3 menu items like in the start menu and you
type 4, it will throw an npe at your face.
remove outdated comment
change Player.getBackPack to Player.printBackPack
Same NPE fix but this time for every menu there.

This also adds and removes some code to cleanup some more.
Add a check if the backpack is empty on die()

This will handle an empty backpack, it looks better when you see a message saying there was nothing in the backpack instead of just having a newline.
Merge branch 'development' of git://github.com/blackwolf12333/JAdventure into blackwolf12333-development