Adding functionality to undo button

undo button clears everything but deck selection

Author: lhunker
Undo changes now works for deck as well

undo changes also undo's changes to the selected deck

Author: lhunker
Merge branch 'GUIFixes' of github.com:dbeckwith/wpi-suite into GUIFixes

Conflicts:
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/planningpoker/view/main/NewGamePanel.java
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/planningpoker/view/main/NewGameRequirementsPanel.java

Author: lhunker