Feature version 2.0.1

[sfsinger19103]

Changes since v.2.0

• Improved documentation
  • revised existing files
  • added comprehensive instructions for getting started (Sample_Session.md, Installation.md)
  • added instructions for unit tests (Testing_Code_with_pytest.md)
  • Added CODE_OF_CONDUCT.md, CONTRIBUTING.md and CONTACT_US.md
  • Improved in-line documentation of code
• Improved error messaging
• Moved all references to postgres into database submodule
• Corrected reference and name for NIST json export
• Cleaned up some munger, jurisdiction and ini_files_for_results files
• Rounded bar chart output percentages to nearest 0.1%
• Slugified output file names
• Fixed encoding-related bug for Windows environments (per Journal of Open Source Software review)
• Improved file names for analysis exports
• Fixed some bugs