Prepare the release for 1.1.0-beta-1.
Add a config file for Transifex.
Update current playlist when the current player

changes.
Update the Transifex config.

- Correct the file filter, so that files are transferred to/from the correct
  locations.

- Add a language map to just use language specific directories for the
  moment.
Use static version numbers for support libraries for build reproducibility.
Remove spurious newlines, correct spelling of "Wi-Fi".
Updates to the Dutch translation, submitted by spamba@gmail.com.

The translation was submitted via Transifex, which has collapsed some
whitespace and made other inconsequential changes.
Prepare the release for 1.1.0-beta-2.
Merge branch 'develop' into release-1.1.0

* develop:
  Reformat model/Player.java.
  Update the action bar player spinner when players change.
  Format filenames as plain text.
  Fix action bar player dropdown for 2.3 and previous
  Save selected album sort order on server
  Correct instructions about release branches.
  Update the Transifex config.
  Update current playlist when the current player
  Add a config file for Transifex.
Remove unnecessary call to registered player callbacks.

Add note indicating that changeActivePlayer() already does this. Pointed
out by Kurt.
Fix a bug where songs with no artwork were not displaying default artwork.

Caused by the switch to have a Song not return null for the artwork URL.