Update Vagrant box to trusty because of raring server issues

13.04 is end of life.  Servers are probably down (from http://archive.ubuntu.com/ IP: 91.189.91.15 80), it could be permanent or maintenance. Updated to 14.04 box.

Details - http://askubuntu.com/questions/498464/failed-to-fetch-packages-from-http-archive-ubuntu-com-ip-91-189-91-15-80