JC version 1.15.1

• New feature to show parser documentation interactively with -h --parser_name
  for example: $ jc -h --arp
• Add man page to pypi package for easier packaging in homebrew
• Update rpm-qi parser to add two calculated timestamp fields: install_date_epoch and install_date_epoch_utc
• Clean up documentation and autogenerate the Parser Information section from metadata

Release Notes: https://blog.kellybrazil.com/2021/04/07/jc-version-1-15-0-released/