Each job should store and archive screenshots (#304)
Revert "Enable tests for Windows 8.1 (#251)"

This reverts commit 63e5fcc58b75a5a857e6cbfca09a0049c6d31010.
Use comma as separator for artifacts (#304)
Upgrade to Mozmill 1.5.23 (#310)
Disable daily tests on Win8.1 for esr builds too (#307)
Upgrade to Mozmill 2.0
Add 4th node for each platform and OS X 10.9 (#315)
Fix upgrade patch to Mozmill 2.0
Re-add email notification address (#317)