support 14.04 via old endpoints
Merge pull request #140 from opscode/lcg/ubuntu-14.04

support 14.04 via old endpoints
Have a sane way of managing omnibus.rb files in the pipelines.
Pick up windows-compat-defaults of omnibus-ruby.
Merge pull request #141 from opscode/pkg-signing

Have a sane way managing omnibus.rb files in client pipelines
Make client pipelines build dmgs.

Since `Omnibus.config[:sign_pkg] = false` is not working because omnibus is loading all the project files, temporarily switching over to having an additional file for client pipelines until we enable signing on chefdk slaves.
Update libyaml to 0.1.6 on windows.
Testing disk-cleanup branch of omnibus-ruby.
Merge pull request #142 from opscode/client-dmg

Enable dmg building in chef-client pipelines.
Chef & Ohai version overrides + pick the right things in omnibus-* for RC release.