anchor.diff:  * conversion of single file (no master document)
   * package images referenced by content
   * do we need the SVG property if the HTML links to an SVG document?
  +* how custom CSS is specified
   
   == NOTES
   
  +* content must be XHTML (not HTML)
  +* 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)
   * vw is 1% of viewport width (see http://dev.opera.com/articles/view/css-viewport-units/)
  
positive.code: //^
  
  .Converter
  * CRITICAL: put e-book reader class on html instead of body
  * CRITICAL: dropping subsequent paragraphs of preamble when abstract is found...need to pass them through
  * CRITICAL: try to pull username from author email field; pull image from gravatar
  
negative.code: * Kindle won't accept fonts that are less than 1K (typically can't create a font with just one or two characters)
  * Control+Shift+u to type in a unicode sequent, then press enter to accept
  * Calibre gets confused when there are local fonts that closely match font in stylesheet, uses them over embedded styles (in particular M+ weights)
  * iBooks info: http://authoradventures.blogspot.com/2013/08/ibooks-tutorial-update-version-30.html
  