vagrant: upgrade before installing packages

also get rid of $j JS variable

Author: raylu

Diff for: static/js/account.js

@@ -1,6 +1,6 @@
 window.addEvent('domready', function() {
 	'use strict';
-	var $j = jQuery.noConflict();
+	jQuery.noConflict();
 
 	document.addEvent('click', function() {
 		var emails = $('emails');

Diff for: vagrant.sh

@@ -3,6 +3,7 @@
 set -e
 
 sudo aptitude update
+sudo DEBCONF_FRONTEND=noninteractive aptitude --quiet --assume-yes dist-upgrade
 sudo aptitude --quiet --assume-yes install python3.3 python3.3-dev postgresql-9.3 libpq-dev
 
 pyvenv-3.3 venv