Allow dropping image directly from Google image results.
Fix handling of acoustid network errors
Fix stash-pop generated error

I tested this before a stash but failed to retest it after a stash pop.
Sigh.
Address minor zas comment
Address zas, freso comments
Address zas comment
Add %_absolutetracknumber% variable...

...so you can number tracks sequentially on multi-track discs without
using a disc number.

See http://forums.musicbrainz.org/viewtopic.php?pid=25326 for
requirement.
Change name to albumtracknumber

to fit better with totalalbumtracks cf. tracknumber and totaltracks
D'oh - should be ~ not _
Address bitmap comment.
Switch back to %_absolutetracknumber%
Fix lyrics tag displays with []
Address final zas comment
Merge pull request #241 from Sophist-UK/sophist_fix_acoustid_webservice_errors

Fix handling of acoustid network errors
Update po/picard.pot
Merge pull request #231 from Sophist-UK/sophist_add_absolutetrack_number

Add %_absolutetracknumber% variable...
Merge pull request #217 from Typz/googleImages

Allow dropping image directly from Google image results.
Add a note about Google images direct drop feature to NEWS.txt
Merge pull request #249 from Sophist-UK/sophist_fix_lyrics_display

Fix lyrics tag displays with []