Add Vagrantfile to build a C-Pod repo host

Fix various problems in the recipes
Add users default GitHub key for root access

Use Ruby 1.9.3 in Ubuntu as Ruby 2.0 is broken in Ubuntu 14.04
See http://blog.costan.us/2014/04/restoring-ruby-20-on-ubuntu-1404.html
Add host users authorized_keys for root
Add hash for suitable boxes, tidy up comments
Fix c-pod group update to avoid CHEF-3694
Use upstream apache2 cookbook at latest