Update version numbers to 4.4.7
Merge pull request #481 from melissalinkert/4.4.7-version

Update version numbers to 4.4.7
Update version numbers to 4.4.8-{DEV,SNAPSHOT}
merge dev_4_4 -D org -I include -E exclude: PR 484 (Update version numbers to 4.4.8-{DEV,SNAPSHOT})