Added UniScrollingManager
Implemented tracking for maximum direction traveled for UniScrollingManager
Preliminary UniScrollingManager is complete, still some bugs
Fixed edge case painting issues with UniScrollingManager
Removed DefaultScrollingManager
Implemented Player from going out of Level bounds (in Level)
Merge branch 'scrolling_platformer' of https://github.com/duke-compsci308-spring2013/vooga into scrolling_platformer

Conflicts:
	src/vooga/scroller/collision_manager/CollisionManager.java
	src/vooga/scroller/level_editor/Level.java
	src/vooga/scroller/model/Scroller.java
	src/vooga/scroller/sprites/superclasses/Player.java
Implemented getHardBoundary() in Level and enforced it in ScrollingManager
Merged
Fixed issue with background not scrolling correctly with UniScrollingManager
Refactored UniScrollingManager