anchor.diff:  * rename align to text_align?
   * QUESTION should bullets be on right if list alignment is right (what about center?)
   * QUESTION should we resolve font-based icons globally, in init_pdf?
  -* if alt text for inline image is empty string, image is not written
  +* FILE ISSUE if alt text for inline image is empty string, image is not written
   
   * use treetop to parse and evaluate theme file
   * use or don't use pad method? check performance
  
positive.code: * allow general settings for admonition icon to be set using admonition_icon key prefix (e.g., admonition_icon_size)
  * allow alignment to be set on discrete heading using role
  * submit pastie theme for Rouge upstream (PR sent, see https://github.com/jneen/rouge/pull/576)
  * SIMPLE: document autofit option on verbatim blocks (in README?)
  * SIMPLE: fill in missing defaults in theming guide
    - title_page
    - toc
    - table_header_cell
    - admonition_icon_<name>_stroke_color
    - description_list_term_font_style
    - header/footer
  * SIMPLE: mark required keys (assume keys are optional by default)
    - required keys can never have a null value; most are set by base theme
  * allow font properties to be set for normal paragraph separate from base (need to think about inheritence)
  * allow alignment of list to be set separately from base align (and perhaps a hint in document) (#182)
  
negative.code: * "Incorrect number of arguments in 'SCN' command" happens when you add a stamp to an imported page
  * be mindful that layout_prose adds margin to bottom of content by default (important when working in a bounding box)
  * ttfunk does not support ligatures (e.g., fi -> ﬁ); we could do this manually in post_replacements
  
  == Questions
  
  * should we calculate column widths before cell data so we can pass width to AsciiDoc table cell?
  * should we ensure natural_content_width is called first (by calling it explicitly)?
    - seems by calling width on table in convert_table, this isn't necessary
  * should width for AsciiDoc cell when autowidth is set default to even distribution (accounting for colspan?)
  
  == Notes
  
  