Update ruby to 2.1.1
Add support for clearing chroot cache directory
Change behavior when `CLEAR_CHROOT_CACHE` is set to false
Merge remote branch 'origin/master' into feature-ruby-update

Conflicts:
	deployment/packagebuild/packages.d/third_party/openvnet-ruby/recipe.rb
Fix gem name
Merge pull request #195 from axsh/feature-ruby-update

Feature ruby update