Adding tasks. (WIP)
Added task overview with link in sidebar.
Improved tasks UI.
Fix comments for task.
Added jquery-ui, acts_as_list for sortable tasks.
Cleanup debugging stuff.
Added comments to tasks. Task count to sidebar.
Added comment count to tasks.
Fixed failing tests.
Added counter_cache. Homogenized layout/functionality. Removed jquery-ui.
Fix task spec.
Merge pull request #243 from stephanvd/tasks

Add task functionality to groups.