Puppet Forge Release 2.1.0

Puppet Forge release 2.0.0

  Marks the commit that the branch stable/grizzly and the 2.0.0 tag is
  cut from, adds the pkg directory to .gitignore to prevent accidental
  committing of Forge artifacts to the repository, updates release notes
  seciton of the README.

Change-Id: Icca41d9448833de35776395eaf2ab6c50a717956

Merge pull request #68 from branan/less_strict_dependencies

Use >= for all module dependencies