Update to omnibus build system and ruby versions

* Use latest Ruby 2.0.0 (p353)
* Use latest Ruby 1.9.3 (p484)
* Add RubyGems 2.1
* Add project for Ruby 2.0 with RubyGems 2.1
* Update omnibus projects (omnibus gem, omnibus-software locked ref)
* Update copyright headings for company name change
* DRY-up the Vagrantfile for parity w/ omnibus-chef
* Automatically generate projects for building based on
  config/projects