Adding params class to clean up management of default parameters. Adding
rc class to handle configuration of gitolite.rc file.
Adding puppetlabs/vcsrepo to requirements secton.
Passing parameters from gitolite class to gitolite::rc.
Merge pull request #12 from eschiller/master

Added ability to configure .gitolite.rc file

Fixes #11. Need to clean up metadata.json before release.