Merge branch 'ci-nav-changes' into 'master'

Integrate CI navigation more tightly with project

![Screen_Shot_2015-09-17_at_09.51.56](https://gitlab.com/gitlab-org/gitlab-ce/uploads/013807ad9f89a35a4af988199c2ee92f/Screen_Shot_2015-09-17_at_09.51.56.png)
![Screen_Shot_2015-09-17_at_09.52.14](https://gitlab.com/gitlab-org/gitlab-ce/uploads/8f9bdaafeef62fa451ee3699f003cbc4/Screen_Shot_2015-09-17_at_09.52.14.png)
![Screen_Shot_2015-09-17_at_09.52.07](https://gitlab.com/gitlab-org/gitlab-ce/uploads/cb726bf0651ddb74c10fd7bae9a333fb/Screen_Shot_2015-09-17_at_09.52.07.png)

/cc @dzaporozhets

See merge request !1324