Bug 1080280 - Validate commit messages +autoland

https://bugzilla.mozilla.org/show_bug.cgi?id=1080280

![screen shot 2014-11-04 at 9 39 13 pm](https://cloud.githubusercontent.com/assets/122602/4913275/22760f14-64ae-11e4-9793-d240a4752d5e.png)