Changes the 0 to a ?. Allows the clearing of a selection. Disables the vote button on an empty selection - mrracine
Merge branch 'feature/Iteration-5-dev-card-panel' into Iteration-5-dev

Still some issues with clearing selections that need to be worked out.

Conflicts:
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/planningpoker/view/voting/CardPanel.java
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/planningpoker/view/voting/VotingButtonPanel.java
Merge branch 'Iteration-5-dev' of https://github.com/alexbragdon/wpi-suite into Iteration-5-dev