Fixed some bugs in GUI (working on #36; fixes #34 by hiding art panel since it's not used). You can walk over ash now. Removed room file writing because it was
unnecessary to begin with. Converted more comments to javadoc style.
Fixed map file reading to only happen once rather than scanning the room
directory all the time, and made Room.java add something to GUI's map array
to indicate that the room has been created and should be drawn.
Merge branch 'master' of github.com:ou-se-sp14-team-stallman/dungeon-crawl-jr

Conflicts:
	DungeonCrawlJr/src/core/Room.java