Prevent naming collision with jQuery's $-function

app.js

@@ -12,7 +12,10 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+var firmwarewizard = function() {
+  var app = {};
 
+  // helper functions
   function $(s) {
     return document.querySelector(s);
   }
@@ -79,9 +82,7 @@ function scrollDown() {
     }
   }
 
-var firmwarewizard = function() {
-  var app = {};
-
+  // constants
   var IGNORED_ELEMENTS = [
     './', '../', 'experimental.manifest', 'beta.manifest', 'stable.manifest',
     '-tftp', '-fat', '-loader', '-NA', '-x2-', '-hsv2', '-p1020'