Bump Mozmill to 1.5.20 (#196)
Merge remote-tracking branch 'upstream/master'
Only run endurance tests on nodes with the 'endurance' label. Fixes issue #173
Allow staging master to execute endurance jobs
Correct typo in README
Disable updates on Aurora due to version bump to 19.0a2
Revert "Disable updates on Aurora due to version bump to 19.0a2"

This reverts commit d290c9dde65ab3e1ca7a4793fc3addde443aebf1.
Merge branch 'production' of github.com:mozilla/mozmill-ci into production