Merge branch 'release/0.9.3' into develop
adds back 'thumbnail_option' and 'use_autoscale' that were accidentally removed in 9b5df50d4f056503af3f1b639c72982675ba6252
updates translations from transifex
adds help text for thumbnail options field
makemessages
fixes transifex config to allow pushing the source language
adds makemessages and compilemessages shortcuts
make messages and compilemessages
adds history entries
version bump to 0.9.4
Merge branch 'release/0.9.4'