Fixed sorting in movie list view. Also added new downloaded quality column.

Fixes #128

src/UI/Cells/MovieDownloadStatusCell.js

@@ -3,4 +3,8 @@ var TemplatedCell = require('./TemplatedCell');
 module.exports = TemplatedCell.extend({
     className : 'movie-title-cell',
     template  : 'Cells/MovieDownloadStatusTemplate',
+    sortKey : function(model) {
+      debugger;
+      return 0;
+    }
 });