Footer cleanup.
Now it is smaller and contains only few items.
Added view controller which is responsible for handling session create requests - using button in header.
Also some refactoring changes needed by mentioned changes.
Refactoring changes needed to move responsibilities of creating cookies to SessionHandler class.
Changes in playlist item view - added item index and animation to removing/showing album cover and buttons.
Incremented version number due to playlist changes and removed number of an UI issues.
Changes in travis.yml file.