Bug 920020 - Release Mozmill 2.0. r=dhunt

Release Mozmill 1.5.23. r=dhunt

Bug 918322 - Release Mozmill 2.0rc6. r=ctalbert

Bug 907984 - Release Mozmill 2.0rc5. r=dhunt

Bug 907983 - Fix mozrunner dependency for jsbridge and bump to 2.4.18…

…. r=ctalbert

Bug 877131 - Release Mozmill 2.0rc4. r=ctalbert

Bug 869556 - Release Mozmill 2.0rc3. r=ctalbert

Bug 866752 - Bump jsbridge dependency to 3.0rc2

Bug 842939 - Bump versions of jsbridge, mozrunner, and mozmill for 1.…

…5.21 release. r=ctalbert

Bug 834893 - Bump Mozmill version to 1.5.20. r=jhammel