Add tests for classes-to-props

Add basic support for dt-* parsing

Fallback to text content if attributes are not found

Test smaller units of code

Remove unnecessary comment

Add u-* parsing capability

Re-format trailing parentheses

Add support for parsing empty br/hr tags

Get correct property value for special tags

Set initial REPL/run namespace

Use class name for property keywords

Expand selectors to match classes with prefixes

Create test & implementation for p-name parsing

Create initial test and implementation

Initial commit.