replaces c-metrics with lizard. but c measurements are flawed anyway... fixed a bug where timestamps of commits were not converted to dates using the timezone of the repo. branches of repos are only fetched if needed. this speeds up the repository overview if repos exist that have a lot of branches. added structural metrics. fixed a bug where an exception was thrown becuase the metrics plugin tried to operate on a non-existent dom. fixed a bug where axis-labels were recreated each time the filters were updated. improved icon views in lists. added /repo/<id>/branches api.