add beets Tomahawk resolver to extra/ directory

I'm not sure why this was a separate repository to begin with. It's now
versioned with beets.

extra/beets-resolver/README.md

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+beets Tomahawk resolver
+=======================
+
+This is a script resolver for [Tomahawk][tomahawk player] that hooks into
+[beets][beets music manager]. It uses [beets' web plugin][] to access your
+beets library remotely.
+
+To use it, just start ``beet web``, load this resolver, and start playing
+music. Change the hostname and port at the top of the file if the server isn't
+running on localhost (I'll make a real UI for this eventually).
+
+[beets' web plugin]: http://beets.readthedocs.org/en/latest/plugins/web.html
+[beets music manager]: http://beets.radbox.org/
+[tomahawk player]: http://tomahawk-player.org/

extra/beets-resolver/beets.js

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+var BEETS_HOST = 'localhost';
+var BEETS_PORT = 8337;
+
+var BeetsResolver = Tomahawk.extend(TomahawkResolver,
+{
+    settings:
+    {
+        name: 'beets',
+        weight: 95,
+        timeout: 5
+    },
+    resolve: function( qid, artist, album, title )
+    {
+        this.beetsQuery(qid,
+            ['artist:' + artist, 'album:' + album, 'title:' + title]
+        );
+    },
+    search: function( qid, searchString )
+    {
+        this.beetsQuery(qid, searchString.split(' '));
+    },
+    beetsQuery: function( qid, queryParts )
+    {
+        var url = 'http://' + BEETS_HOST + ':' + BEETS_PORT + '/item/query/';
+        for (var i = 0; i < queryParts.length; ++i) {
+            url += encodeURIComponent(queryParts[i]);
+            url += '/';
+        }
+        url = url.substring(0, url.length - 1);  // Remove last /.
+
+        Tomahawk.asyncRequest(url, function(xhr) {
+            var resp = JSON.parse(xhr.responseText);
+            var items = resp['results'];
+
+            var searchResults = [];
+            for (var i = 0; i < items.length; ++i) {
+                item = items[i];
+                searchResults.push({
+                    artist: item['artist'],
+                    album: item['album'],
+                    track: item['title'],
+                    albumpos: item['track'],
+                    source: "beets",
+                    url: "http://" + BEETS_HOST + ':' + BEETS_PORT + '/item/' + item['id'] + '/file',
+                    bitrate: Math.floor(item['bitrate'] / 1024),
+                    duration: Math.floor(item['length']),
+                    size: 83375, //!
+                    score: 1.0,
+                    extension: "mp3", //!
+                    mimetype: "audio/mpeg", //!
+                    year: item['year']
+                });
+            }
+
+            Tomahawk.addTrackResults({
+                qid: qid,
+                results: searchResults
+            })
+        });
+    }
+});
+
+Tomahawk.resolver.instance = BeetsResolver;