Description support in v1 <-> v2 transformations

#56

• Descriptions for headers, url query params, url path variables, and request body data are now handled in transformations.
• Fix disabled: true header (v2) <-> // (commented) header (v1) transformations.
• Fixed bug where both enabled and disabled would appear in transformed entities.
• Request body transformations now follow v1 - v2 compliance
• Removed unwanted enabled: true properties from query params, headers, and request body data