Update omnibus-ruby to fix omnibus-ruby#140
Update chefdk-win project to match *nix changes
Fix build issues for chefdk on win (WIP)

NB: this is pretty rough and probably breaks existing projects
(chef-client). Needs to have configurable behavior for generating batch
file wrappers for chef executables at minimum.
Pull in latest omnibus-sofware w/ win chefdk fixes
Change ruby-windows back to 1.9.3 w/ override for chefdk
Remove bundler from top-level, this was a bad attempt at a bug workaround
Remove commented bundle install code