Dashboard improvements

- Added namespace to dashboard footer.
- Wekkly graph for completed/failed jobs
- Change interpoleration for graphs to prevent the following
http://www.evernote.com/shard/s1/sh/91cdebad-fef5-4895-bd60-b5ee0b277234
/d86e8d48616618459ddd6de8585127dc
Merge pull request #651 from dennisvdvliet/linear_graphs_dashboard

Dashboard improvements