Hi,
the Cockpit 0.21 release is going to be in Fedora 21 Alpha and will be
the one used for the Cockpit Test Day.
https://fedoraproject.org/wiki/Test_Day:2014-09-16_Cockpit
Most/all of what's cooking right now should be fair game for Fedora 21,
I'd say, so we just keep working on master as usual and make releases
from it that will then go to Fedora 21.