Major refactor of service libs, more tests

lib/services/spotify/url.js

@@ -0,0 +1,12 @@
+"use strict";
+var parse = require('url').parse;
+
+module.exports.match = function(url, type) {
+  var parsed = parse(url);
+  if (!parsed.host.match(/spotify\.com$/)) {
+    return false;
+  }
+
+  var matches = parse(url).path.match(/\/(album|track)[\/]+([^\/]+)/);
+  return !!matches[2];
+};