Add some external facts for stash versions
Add class to run git gc on all stash repositories
Merge pull request #4 in LINUX/puppet-stash from f3792625/stash_updates to master

* commit '0e03535205a099299aad9f94e8c15aadf1844e4b':
  Add class to run git gc on all stash repositories
  Add some external facts for stash versions
Merge pull request #9 from mkrakowitzer/minor_improvements

Minor improvements