cleanups and minor bug fixes

- fix failure to set text_only mode correctly when processing list
- add test for text_only mode failure
- document supports for pass style on open blocks and paragraphs
- remove unused regex keys
- don't output colgroup on horizontal dlist if widths not set
- remove old splain methods (we'll reintroduce cleaner debugging)
- change use-link-attrs to linkattrs
- cleanup check for header row in table processing
- add role directly to quoted text element, if applicable
- add AsciiDoc compatibility config for role on quoted text element
- cut out some whitespace from templates, organize erb
update styles

- style blockquote w/o empty attribute div
- style verseblock
- remove span. from inline style classes
- shorten line above footnotes
- remove margin-bottom from qlist when last element
- embolden label in horizontal dlist
Merge pull request #384 from mojavelinux/cleanup

Cleanups