[pitivi] (12 commits) ...Merging translations

[Edward Hervey <edwardrv src gnome org>]

Summary of changes:

  ff5a62b... discoverer: add some debug logs to show how many unfixed pa
  c03ee91... discoverer: add some debugging.
  fa7786f... discoverer: handle state change failure going to PLAYING.
  83fab35... discoverer: generate shorter filenames for thumbnails.
  1cde41c... discoverer: add a comment about the EOS elements.
  468b144... discoverer: blind fix for subtitle movies never going EOS.
  040a4f9... discoverer: try a better fix for subtitles
  c46b874... Change the default timeline colors to black (video) and gre
  8ef1474... Pass valid uris for filenames to discoverer. Fixes #611996.
  3731a7a... Fix tests/common.py so that I can use trial to run tests ag
  bc25d36... Fix discoverer tests.
  6950aa5... Merging translations