Playlist API methods now return artist foreign IDs

Hey all:

We've made a minor update to our Playlist API. Now when you request a foreign id bucket in a playlist call, the artist foreign ids will be returned in addition to the song/track foreign IDs. For example if you make a call like:

http://developer.echonest.com/api/v4/playlist/static?api_key=YOUR_API_KEY&artist=Weezer&format=json&results=1&type=artist&bucket=id:rdio-US&bucket=tracks&limit=true

The returned song block will look like:

"songs": [
{
    "title": "Rainbow Connection (feat. Hayley Williams)",
    "artist_name": "Weezer",
    "artist_foreign_ids": [
        {
            "catalog": "rdio-US",
            "foreign_id": "rdio-US:artist:r139688"
        }
    ],

   "tracks": [
    {
        "foreign_release_id": "rdio-US:release:a937189",
        "catalog": "rdio-US",
        "foreign_id": "rdio-US:track:t10934395",
        "id": "TRTUXCJ136B49B20EF"
    }
],

"artist_id": "AR633SY1187B9AC3B9",
"id": "SOSVPWC1338A5D27C3"
}

]