removed backbone from VS solution,

renamed NzbDrone.Backbone to UI

UI/AddSeries/RootFolders/RootFolderCollection.js

@@ -0,0 +1,10 @@
+"use strict";
+define(['app', 'AddSeries/RootFolders/RootFolderModel'], function () {
+
+    var rootFolderCollection = Backbone.Collection.extend({
+        url: NzbDrone.Constants.ApiRoot + '/rootfolder',
+        model: NzbDrone.AddSeries.RootFolders.RootFolderModel
+    });
+
+    return new rootFolderCollection();
+});