added generate-html option from a catalog.json file

Hi Peter,

Please check out this Merge request (new at Merge request in gitlab, I think they are the same as PRs in github)

See file changes:

• .editorconfig - helps editor configuration
• .gitignore - added some ignorable files
• calcyfy - added the option for --generate-html see that I had to move things around to make it optionable
• test_data/catalog/CATALOG.json - added catalog file to test

Features:

• Added the default help() to be called if no arguments given
• --generate-html will loop through all directories given and with a JSON file (named 'CATALOG.json') create an HTML file

untested (like savages) will test

Cheers, Moises