Improve project page height

old thing. Grey block not aligned to the bottom. It was a scroll even with short project description.

![Screen_Shot_2015-10-01_at_16.03.24](https://gitlab.com/gitlab-org/gitlab-ce/uploads/b412eeaa40c79861191d1a432d95951d/Screen_Shot_2015-10-01_at_16.03.24.png)

New awesome stuff, no scroll, grey block aligned to the bottom. 

![Screen_Shot_2015-10-01_at_16.04.08](https://gitlab.com/gitlab-org/gitlab-ce/uploads/823cdb6bfb8caec892ed001448f731e5/Screen_Shot_2015-10-01_at_16.04.08.png)

See merge request !1487