Add kramdown gem as replacemen for Maruku
Add spec for entities
Add to_prawn code
Add ol and ul

All methods have options to pass specific
details such as a prefix.
options_for renamed to style_for as it better
covers what it returns
Add paragraph indenting
Don't indent paragraphs in li-s
Add links to convert prawn
Add headers to convert prawn
Add quotes to convert prawn, add custom indent to p
Add configurable list options
Update convert prawn test names