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Only allow selecting one item in StageView
Merge pull request #23 from JustDuckItAll/feature-single-selection

Only allow selecting one item in StageView
Tavis might not like this T.T
Merge branch 'team3Master' into feature-activity
Add/Remove users works, stage drop down broke...
Refactored NewTaskView. Still have to fix bug with user lists. Stage selector works.
added gui and stuff
Users are now stored as UIDs
activity log works yay
adding users, however there is multi-selection
add users fixed
fixed test for travis again
Fixed JUnit tests for users
Added comments
Added a way to add users to the set of assigned users
Added comment
Added a test case
Comments
Merge pull request #22 from JustDuckItAll/feature-activity

starting messages