Use publish date if album release date is before Bandcamp launch

Date is parsed using native js Date(), not sure why an external lib was used before.



See http://musicbrainz.org/edit/29612074
Merge remote-tracking branch 'upstream/master' into publishdate
Fix up off-by-one error concerning months

getUTCMonth() returns month as 0..11
Bump @version
Merge pull request #23 from zas/publishdate

Bandcamp: use publish date if album release date is before Bandcamp launch