anchor.diff:  * CRITICAL: padding around code in formal listing blocks
   * CRITICAL: check style of level 5 and 6 headings (see Groovy docs)
   * CRITICAL: use CSS3 filter scheme that allows admonitions to appear correctly on Google Play Books
  -  - see if Google Play books supports JavaScript and epubReadingSystem (no, but adds its own class to body)
  + ** see if Google Play books supports JavaScript and epubReadingSystem (no, but adds its own class to body)
   * CRITICAL: use a following sibling selector for :first-line in abstract so it works when page is partitioned (e.g., in Google Play Books)
   * CRITICAL: add support for different numbering systems (lowergreek, etc)
  -* CRITICAL: surround prose in <span> (e.g., simple <dd>) which is not nested in <p> or <div> so iBooks can change the font
  +* HIGH: should we restore font size of embed table cell?
  +
  + table.table div.embed > *:not(p) { font-size: 1.25em; }
  +
   * HIGH: kindlegen no longer strips <header> elements, so we can drop our div wrapper hack
  -* HIGH: don't set text color so light on monochrome devices (use media query to detect)
  -* HIGH: make justify-text a class on body that can be controlled from AsciiDoc attribute (don't use word joiner in this case)
  +* HIGH: don't set text color so light on monochrome devices (use media query to detect) (#67)
  +* HIGH: make justify-text a class on body that can be controlled from AsciiDoc attribute
   * HIGH: image border option (or add drop shadow to screenshots in README)
   * HIGH: review the table border color
   * HIGH: style example block
   * HIGH: allow theme to be customized using stylesheet attribute
   * HIGH: move -webkit-hyphens: auto to epub3-css3-only inside @media not amzn-kf8? (if we decide to reenable)
   * MEDIUM: headshot has too much top margin when at top of page (not below section title)
  -* namo pubtree is justifying preformatted blocks
  +* MEDIUM: namo pubtree is justifying preformatted blocks (still true?)
   * support both jpg and png avatars
   * add docinfo support
   * add navigation links in meta, e.g.,
  
positive.code: * MEDIUM: rename OEBPS folder to EPUB
  * MEDIUM: set modified date explicitly
  * MEDIUM: use function to build and manipulate image paths
  * MEDIUM: issue warning if front-cover-image doesn't match proper syntax
  * MEDIUM: option to add nav.xhtml to navigation flow?
  * MEDIUM: add Pygments stylesheet to archive if pygments-css=class
  * support subtitle as separate from main title in package metadata
  * support collection title in package metadata
  
  
negative.code: 
  == NOTES
  
  * content must be XHTML (not HTML) (this will change in EPUB 3.1)
  * Aldiko uses the image on the cover page (or a screenshot of the cover page) as the image in the bookshelf
  * use -webkit-transform: translate/translateX/translateY to move objects from origin by relative distances (alternative to relative positioning, which is not permitted on Kindle)
  * don't need attributes above header in sub-documents anymore (except for PDF; we'll cross that bridge when we get to it)
  