[HIERA] Changed mysql backend to hold YAML files instead of raw hashes.
Support for other merge behaviours than native is added when :merge_behavior is defined in hiera.yaml and the 'deep_merge' ruby gem is installed. (support for future features)
Re-added contributor
Merge remote-tracking branch 'upstream/master'
We don't require pp in production
Merge pull request #39 from fdammeke/master

[HIERA] Changed mysql backend to hold YAML files instead of raw hashes.