R1:79ef667dfdc8

Render build status on revisions and commits

Summary:
This uses an event listener to render the status of builds on their buildables. The revision and commit view now renders out the status of each of the builds.

Currently the revision controller has the results for the latest diff rendered out. We might want to show the status of previous diffs in the future, but for now I think the latest diff should do fine.

There's also a number of bug fixes in this diff, including a particularly nasty one where…