Spotify `?si=` query param support

Spotify recently added a default ?si= query param to the Spotify URL when exporting an URL from the player. This would break the URL validation check prior to this release, but is now updated to support the added query param.

Ukrainian translations

Adds Ukrainian translations provided by @Sestowner

Initial release

Supports both Spotify URIs (spotify:album:1DFixLWuPkv3KT3TnV35m3) and Spotify URLs (http://open.spotify.com/track/6rqhFgbbKwnb9MLmUQDhG6).

Allows setting custom alignment, width and height of widget.

Supported languages: English (en), Norwegian Bokmål (nb).