Document PlanningPokerGame
Change PlanningPokerGame to store requirement IDs, not Requirement objects

Fixes server-side exception when working with games.
Fix double send bug
Merge branch 'sbl-dev' of github.com:bbiletch/wpi-suite into bbiletch-sbl-dev

Conflicts:
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/PlanningPoker/models/PlanningPokerGame.java
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/PlanningPoker/view/NewGameTab.java
Merge branch 'sbl-dev' of git://github.com/struct-by-lightning/wpi-suite into sbl-dev

Conflicts:
	PlanningPoker/src/edu/wpi/cs/wpisuitetng/modules/PlanningPoker/view/NewGameTab.java
Merge pull request #144 from sfmailand/sbl-dev

Merging from #127
Manually merged Pull request #141 of sfmailand

- Only shwo backlog requirement
Made add/remove buttons uniform

Central add/remove buttons are now uniform over any window size/resolution
Merge pull request #145 from hlong290494/sbl-dev

Manually merged Pull request #141 of sfmailand
Merge pull request #146 from ZPak/sbl-dev

Made add/remove buttons uniform