Rename clean_build property to force_rebuild
Change text to 'forcing a rebuild' instead of 'forcing a clean build' to match the force_rebuild label
Merge branch 'katana' of https://github.com/Unity-Technologies/buildbot into katana
Merge branch 'front-end' into katana
Merge branch 'front-end' into katana
Merge branch 'front-end' into katana
Merge branch 'front-end' into katana
Fix Filtering problem on the builders page:  when unity-4.3-staging is selected, it's displaying branch unity-4.3 instead of unity-4.3-staging
Disable "Resubmit Build" block for running builds.  This should only be enabled after the builds are finished.
Merge katana into front-end