Takes Spotify track URIS and converts them to 'Artist - Track names' using the Spotify API
Track URIs are fed via standard input and can accept any of the following forms for convenience:
spotify:track:<alphanumeric_ID>
http://open.spotify.com/track/<alphanumeric_ID>
<alphanumeric_ID>
These IDs are 22 chars, but this is length is not enforced
Useful for saving Spotify playlists in a format that is easier to understand the revision control changes or export to other music systems
Requires \$SPOTIFY_ACCESS_TOKEN in the environment (can generate from spotify_api_token.sh) or will auto generate from \$SPOTIFY_CLIENT_ID and \$SPOTIFY_CLIENT_SECRET if found in the environment