Merge pull request #74 from bromix/alternative_login

closes #43
Revert "resolve #31"
Merge pull request #76 from bromix/revert-75-delete_playlist

Revert 75 delete playlist
Add french translation
Merge pull request #77 from roondar/master

Add french translation
UPD: code cleaning
Merge branch 'master' into add_to_playlist