Create Ruby meta

Ruby 1.9.3-p327 (via rbenv) and Vagrant 1.0.5
Git ignore Ruby meta directories

The dirs .bundle/ and vendor/ are created by Bundler.
Initial Vagrantfile

Using our existing Ubuntu 12.04 box.
Copy some settings from development Vagrantfile

- Set hostname. Will change this soon.
- Set RTC to UTC to prevent boot hangs.
- Forward SSH agents.
- Share govuk code repos into VM at existing path.
Convert to multi-VM with a single node

Single "development" node. IP address picked from a hat.
Load node definitions from JSON in deployment repo

Source a list of all available nodes by sourcing their hostname, IP address,
VDC name, and Puppet class from the JSON definitions in the dpeloyment repo.
It should be checked out in parallel to this one.

Caveats:

- This only works for people that have access to that repo. If used outside
  of the team then we can look at a way of exporting that information
  periodically.
- The IP addresses may conflict with something else.
- There will be some nodes that aren't actively used. However this is better
  than generating our own source of truth about the available machines.
- It's a bit slow. Maybe we can cache the node list? Maybe it's just
  Vagrant?