fix bug 934448 - Use HTML5BP offscreen method
Fix bug 924603 - Make navigation more accessible.
Added DocumentTag model to the admin interface.
Added config option for number of CPUs of the Vagrant box.
Merge pull request #1582 from jezdez/vagrant-cpu

Added config option for number of CPUs of the Vagrant box.
Merge pull request #1581 from jezdez/admin-improvements

Added DocumentTag model to the admin interface.
Merge pull request #1580 from darkwing/a11y-924603

Fix bug 924603 - Make navigation more accessible.
Merge pull request #1579 from darkwing/offscreen-voice-934448

fix bug 934448 - Use HTML5BP offscreen method