Vagrant support

- Chef server can be bootstrapped on Vagrant
- fixed wrong param in settings example, deleted Chef 10 security rule
- added .rvmrc with chefabulous gemset
- added Gemfile for Vagrant related gems
- bumped connection attempts to 30
- check for support Ubuntu release
- check that only one mode is passed
- double check the running Vagrant VM to make sure we dont bootstrap the wrong one
- allows for the Vagrant to be nuked as well
- basic Chef server installation