Playlist import/export options with Spotify

[mykebates]

Have not fully vetted how this would/should work. But the main idea is to be able to pull in songs from your Spotify playlist and import them into your playlists on the web app. There are likely users who have finely tunes Spotify playlists, so we should let them pull those in easily. Of course there is the matter with keeping those in sync and whatnot that need worked out.

The other idea is to add individual songs back to Spotify. So if you hear something playing that you like, you should be able to easilyt add that to a Spotify list of yours from the web app.