Add handling for styles of profiles

[camdenmoors]

General usage:
Update profiles
Linting
Validation of format

Rev 1:

• Parsing XCCDF
• Parsing InSpec Profiles
• Finding the difference between two STIGs
• Finding the difference between an InSpec Profile and a STIG
• Add functions to automatically update changed controls to the SAF CLI
• Add better unit tests than 'it parses correctly'

Rev 2:

• DISA/DOD/CIS benchmarks styles e.g those at https://saf.mitre.org/#/normalize
• Linting with style guides
• Integrating Cookstyle