Adding close queue functionality
Hide 'Queue me' button if queue is not active
Add check and throw exception if post is sent to join closed queue.
Change from ng-if to ng-show as I saw we had used that before.
Add 'Open' button which is shown if queue closed.
Add functionality for re-opening a closed queue.
Change type of exception
Remove unnecessary imports
Change to NotFoundException
Change auth divs, add method to fetch active queues, add queue column annotation
Change to ForbiddenException
Change unnecessary bool=true check
Merge pull request #17 from mvk13ogb/closequeue

Adding close queue (and open closed queue) functionality.