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
removing restore-selinux-context git issue 577
Merge pull request #12 from jrcloud/de294-selinux

Merged automatically by jenkins after successful build test
Added log and attribute save

When running the cookbook for the first time the password attributes are not
saved by default. This added a node.save as well as a log message that the
passwords are being created.
Code Flow Change

Modified the flow of the setup recipe
Changed the db-sync execute block so it would always run
added some comments.
Merge pull request #13 from cloudnull/node-attrs

Merged automatically by jenkins after successful build test
moved includes.
changed log statement to only use 79char
added default template files to be set if not found
added default template files
added repo munging for alembic
enabled verbose by default
added rabbit ha queues
added log statement
made more pretty
updated attr name
fixed rabbit host var
fixed typo
fixed logic for dirty hack