Proofread changelog for 1.3.9
Datestamp 1.3.9 in changelog
Version bump: 1.3.10

This may turn into 1.4.0 depending on the scope of the release, but 1.3.10 for
now.
print google sources url

when releasing a beets version, run the script before running test_lyrics.py, and copy/paste the sources listed on stdout as a bulk add on Google CSE so beets engine is up-to-date.
Merge pull request #1098 from xsteadfastx/master

Added fix_permissions plugin
Docs/changelog for permissions (#1098)
the plugin now listens also for item_moved