Show committer's name in builds list

My reasoning behind only adding the committer (not the author) is that 
- most of the time they're one and the same, 
- normally, whenever a build fails, it's up to whoever committed to revert, so that's the name you want to see on the list.

I wasn't able to run all the jasmine specs, the one that is affected by my change being one of them. See https://travis-ci.org/travis-ci/travis-web/jobs/4306889 . That being said, this is a trivial patch.

Let me know if you want the author too (or just the author), or if I need to update the spec anyway.