Prevent sysctl from updating to use 0.3.3 upstream
Merge pull request #18 from andymcc/sysctl_fix

Prevent sysctl from updating to use 0.3.3 upstream
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 #19 from claco/contributing

Merged automatically by jenkins after successful build test
Add Hugh, Andy & Marcelo to the authors