Fixed a few loose ends + help pages

- Remove all instances of the Door object (due to being depracated for
many MC updates)
- Closed a few loose file streams
- Remove a lot of unused imports (cleaner code)
- Fixed a undefined Collection (not like java compiles it that way, but
whatever)
- Added pages for the help menu (/ma help <page#>)

Note: Github is messing up on the changes..
Merge branch 'bleeding' of https://github.com/Ultimate-N00b/MobArena into bleeding

Conflicts:
	src/com/garbagemule/MobArena/ArenaListener.java
	src/com/garbagemule/MobArena/MASpawnThread.java
	src/com/garbagemule/MobArena/health/HealthStrategyHeroes.java
	src/com/garbagemule/MobArena/repairable/RepairableComparator.java
	src/com/garbagemule/MobArena/repairable/RepairableDoor.java
	src/com/garbagemule/MobArena/waves/WaveParser.java