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.