Load TXXX frames that conflict with Picard tags into the ~id3:TXXX namespace
Merge branch 'master' of github.com:musicbrainz/picard into mwiencek-master
Implement QNetworkAccessManager-level caching
Merge pull request #84 from zas/QNetwork_cache_control

Implement QNetworkAccessManager-level caching
Handle _translate() case for new pyuic versions

The code in setup.py replaces QtGui.QApplication.translate() with _(),
but it does not handle _translate(), this patch is fixing that.
Set source outside the loop.
Merge remote-tracking branch 'zas/setup_translate'
Really enable lookup metadata action for cluster list.

When selecting non-empty cluster list, Lookup action was possible (button enabled, action called),
but no real action was taking place.
This patch enables it.
Avoid painful use of isinstance
Request CAA only if MB indicates release has caa artwork

Since 2013/01/28, web service is indicating if release has artwork
at cover art archive, use this info to prevent useless requests.
Related to http://tickets.musicbrainz.org/browse/MBS-4536
CAA types selection: replace free text input with a list with checkboxes

Free text input was simple, but it can't be translated, and isn't very user-friendly.
This patch introduces a CAA types selector, with translatable titles and descriptions.

Upgrade is seamless since the whole list is still saved/load as a simple string using
space as separator, with english lowercased names of each type.

Define missing tabstops for Cover Art options UI
Regenerate picard/ui/ui_options_cover.py with pyuic 4.9.6
Tiny loop simplification
Replace Windows-incompatible characters as the last step (fixes PICARD-393)
Merge branch 'ws_caa_mbs_4536' of https://github.com/zas/picard
Simplify the cover-art-archive element handling
Use CAA information when only 2 or 1 image types are enabled.
Don't download the CAA index.json when no types are enabled
Only create caa_node if it exits in the xml
Don't enable "other versions" if more than one album is selected
Use only the duration from fpcalc (for consistency)