Cleaned up Cheffile. Moved to mainstream cookbooks.
Updated a bunch of cookbooks by minor versions.
Adds dynamic rather than static jenkins:user attr to shadow group.
Adds git-client plugin that was extracted from git plugin.
Fixes job creation logic, removing custom job provider and specifying auth_url.
Locks down anonymous completely and clarified instructions for getting github service hook working.
Checkstyle now working and warns for any errors, but still kicks off next job.