Add contribution guidance

Add CONTRIBUTING.md that points to the same document in chef-cookbooks
Add mention of the contribution document in the top of the README.md
Merge pull request #37 from claco/contributing

Merged automatically by jenkins after successful build test
removing restore-selinux-context GH 577
Merge pull request #38 from jrcloud/de294-removeselinux-context

Merged automatically by jenkins after successful build test
version bump
Version Bump to 4.1.3
Merge pull request #39 from rackerjoe/master

Version Bump to 4.1.3
move version out of metadata.rb into VERSION
Merge pull request #40 from rackerjoe/master

Merged automatically by jenkins after successful build test
Change graphite default from public network to management network. Fixes https://github.com/rcbops/chef-cookbooks/issues/493
Merge pull request #41 from jcannava/DE228

Merged automatically by jenkins after successful build test
Switch to package_options from package_overrides
Merge branch 'havana' of github.com:rcbops-cookbooks/graphite

Conflicts:
	metadata.rb