In bug 749312, we were given permission to create a source readme
instead of a source tarball. This will save us cycles, disk, and
human configuration time.
We still need to address the missing balrog_props.json for
beetmover-source for that task to turn green.
MozReview-Commit-ID: wnyPoNXCsH
--HG--
extra : rebase_source : 843751523e1fce5743849f43796788dbba5115d3
extra : histedit_source : 2993eb186dc7bd71ad35af48d4393803b0b147dc
Aki Sasaki