inspec-profile-parser - for use in enhancing and stablizing inspec-delta

[aaronlippold]

• review treetop or parslet ( parslet is already used in the inspec project )
  • see: https://github.com/mitre/parslet-inspec but it was just an experinment - there may be better approaches
  • I am open to non-ruby parsing langs but thought keeping it all ruby may be useful
• Goal is to have a PEG parser of an inspec profile to consume a profile - Profile JSON or Results JSON so that we can more easily update and regenerate profiles when compairing to XCCDF content or other sources.
• We can then easily use inspec-objects to update and recreate profiles and PRs for updates.
• This may be its own project in the end
• This can then be used to look at expanding inspec-detla to support eugenes overlay profiles and other more advanced use cases