[no-task]: added files for offline use
[no-task]: changed button color
[some-task]: not all groups are shown: only ones which has been created by the current user or the user is member of the group
[no-task]: topic is shown on the dashboard
[some-task]: topics can now be removed
[no-task]: topics can now be modified
[no-task]: Sub-topic string added
[no-task]: tried polymer