[FEATURE] Add support for remote beets catalog
[FEATURE] Begin to split up in local and remote catalog
[FEATURE] Add support for synchronisation with local Beets Catalog
Rewrite of the hole interface to Beets because I am not happy with the code.
[FEATURE] Change wrong comment, make some cleanup
[FEATURE] Add License header
[FEATURE] Rework Beets remote interface
[BUGFIX] Improve display in UI
[FEATURE] Rearrange code to avoid code duplication and fixes some small bugs
Also adds lot of PHPDoc.
[BUGFIX] Remove slash between filename and virtual file extension
[BUGFIX] Add filesize to local catalog files
Add the filesizes because without them, ampache will not stream the files.
Change code according to coding guidelines (with php-cs-fixer.phar)
Fixed ability to catalog TV shows.
Revert TVShow episode tag and field names before #412 merge
Fix typo
Add TheAudioDB Ampache default API key
Add SubSonic API maxBitRate parameter support (fix #399)
Change '/usr/bin/beet' command line to 'beet'
Add lc_charset support on local catalog clean (fix #377)
Translation update

Ger translation updated due to last changes.
Fr translation via Google Translator updated due to last changes