v3.0.0

3.0.0
Major rewrite with breaking changes.
Recipes broken out into individual cookbooks
yum_key resource has been removed
yum_repository resource now takes gpgkey as a URL directly
yum_repository actions have been reduced to :create and :delete
'name' has been changed to repositoryid to avoid ambiguity
chefspec test coverage
gpgcheck is set to 'true' by default and must be explicitly disabled