Generates CSS boilerplate based on the selected HTML.

Early & opinionated version:

• Only cares about classes, ignores id's/other possible selectors
• Outputs flat CSS structure
• ... with optional classless first-child element nesting
• Indents with 2 spaces
• Made primarily to simplify working with BEM methodology

Future: I'll extend it with different transformers/formatters as settings. Contributions welcomed.