Add additional options

[eimlav]

• Add option to provide override module and version

• Add option to supply override from metadata.json in CWD

• Add alternative local/remote YAML file argument

• Add module deprecation warnings

• Add .gitignore file

• Add parallel processes

• Add rubocop

• Add .travis.yml

• Add tests

• Update README.md

Also authored by: lionce loredana.ionce@puppet.com

[eimlav]

Hi @ekohl any chance you could take a look at this when you're free? Thanks!