Added check that requirement is not already displayed.  This version uses the ID and not the name.
Merge branch 'dev-set3-iteration3' of https://github.com/333fred/wpi-suite-tng into dev-set3-iterations
Merge branch 'dev-set3-iteration3' of https://github.com/333fred/wpi-suite-tng into dev-set3-iteration3

Conflicts:
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/requirementsmanager/view/RequirementTableView.java

Fixed conflicts that were created while I was working on the check using rUID for duplicate tabs.
Merge branch 'dev-set3-iteration3' of https://github.com/333fred/wpi-suite-tng into dev-set3-iteration3
Added basic validation for tasks, effort, and estimate
Merge branch 'dev-set3-iteration3' of https://github.com/333fred/wpi-suite-tng into dev-set3-iteration3
Improved the update in Requirement/Iteration View, with Matt
Properly linked JCalendar
Limited accepted characters for textEstimate to 0-9
Began making table entries sentence case
Merge branch 'dev-set3-iteration3' of https://github.com/333fred/wpi-suite-tng into dev-set3-tableview
Merge branch 'dev-set3-iterations' of https://github.com/333fred/wpi-suite-tng into dev-set3-tableview