Merge branch 'add_last_push_widget' into 'master'

Add last push widget to starred projects dashboard

This adds the last push widget to the starred projects dashboard. If a user set the starred projects dashboard as their preferred dashboard they would not see last push widget. The look is seamless between starred and 'your projects' dashboards.

### Screenshot:

![Screen_Shot_2015-10-01_at_3.15.52_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/2f5dcf49c3d0186bdd05bb6788b143f1/Screen_Shot_2015-10-01_at_3.15.52_PM.png)


See merge request !1304