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 #11 from claco/contributing

Merged automatically by jenkins after successful build test
Updating version # to 4.1.2
removing restore-selinux-context git issue 577
Merge pull request #12 from jrcloud/de294-selinux

Merged automatically by jenkins after successful build test
added ha queues and logging
Merge pull request #15 from cloudnull/grizzly

Merged automatically by jenkins after successful build test