FIXME: This is out of date...
- where/how to resolve text-transform, font-variant, letter-spacing?

- superscript/subscript (vertical-align)

- font differences for CPDF->selectFont().  Equivalent thing for
   PDFLib?

- document getting non-latin glyphs working

- write a 'quick start' guide

- support for links

- "Firstly a suggestion. When an image doesn't have width and height tags
specified it renders the picture, but if the picture is in a table cell
the table cell has a width of 0. This isn't really a bug, and yes people
really should be specifying the width and height, but I thought I'd point
it out anyway."

- render form controls?

- Need to handle *2 style relative column widths (specified in table attributes),
  col/colgroup tags

- *** Partly done: tbody tested *** test tbody/thead/tfoot tags

- inline-block positioning is a little screwy, esp. when text is justified.
  Should figure out a better way of accounting for block frame heights wrt lines.
  (reflow vs. position?, adding blocks to lines)

- table splitting: split rows, redraw thead & tfoot elements across split tables

- potential optimization: refrain from traversing the tree in Stylesheet and
  merge it with the decoration step; use a visitor?

- log errors/warnings somewhere, probably in session or to a file

- generated PDFs crash kpdf

- pseudo-selectors:
   :before
   :after
   :first-child
   :first-line
   :first-letter
   :link

- lists
  table captions
  nested tables
  absolutely positioned elements
  relatively positioned elements
  floats
  images (DONE: jpeg & png only)

- Property support:
  azimuth                | N/A
  background-attachment  | 
  background-color       | y
  background-image       | untested
  background-position    | 
  background-repeat      | 
  background             | 
  border-collapse        | y
  border-color           | y
  border-spacing         | y
  border-style           | y
  border-top             | y
  border-right           | y
  border-bottom          | y
  border-left            | y
  border-top-color       | y
  border-right-color     | y
  border-bottom-color    | y
  border-left-color      | y
  border-top-style       | y
  border-right-style     | y
  border-bottom-style    | y
  border-left-style      | y
  border-top-width       | y
  border-right-width     | y
  border-bottom-width    | y
  border-left-width      | y
  border-width           | y
  border                 | y
  bottom                 | 
  caption-side           | 
  clear                  | 
  clip                   | 
  color                  | y
  content                | 
  counter-increment      | 
  counter-reset          | 
  cue-after              | N/A
  cue-before             | N/A
  cue                    | N/A
  cursor                 | N/A
  direction              | 
  display                | block|inline|table|table-row|table-row-group|table-cell|list-item (sorta)
  elevation              | N/A
  empty-cells            | 
  float                  | 
  font-family            | y
  font-size              | y
  font-style             | y
  font-variant           | y
  font-weight            | y
  font                   | y
  height                 | y
  left                   | 
  letter-spacing         | 
  line-height            | y
  list-style-image       | 
  list-style-position    | 
  list-style-type        | non-numeric only
  list-style             | 
  margin-right           | y
  margin-left            | y
  margin-top             | y
  margin-bottom          | y
  margin                 | y
  max-height             | y
  max-width              | y
  min-height             | y
  min-width              | y
  orphans                | 
  outline-color          | 
  outline-style          | 
  outline-width          | 
  outline                | 
  overflow               | 
  padding-top            | y
  padding-right          | y
  padding-bottom         | y
  padding-left           | y
  padding                | y
  page-break-after       | y
  page-break-before      | y
  page-break-inside      | y
  pause-after            | N/A
  pause-before           | N/A
  pause                  | N/A
  pitch-range            | N/A
  pitch                  | N/A
  play-during            | N/A
  position               | 
  quotes                 | 
  richness               | N/A
  right                  | 
  speak-header           | N/A
  speak-numeral          | N/A
  speak-punctuation      | N/A
  speak                  | N/A
  speech-rate            | N/A
  stress                 | N/A
  table-layout           | y
  text-align             | y
  text-decoration        | y
  text-indent            | y
  text-transform         | y
  top                    | 
  unicode-bidi           | 
  vertical-align         | within table-cells
  visibility             | 
  voice-family           | N/A
  volume                 | N/A
  white-space            | y
  widows                 | 
  width                  | y
  word-spacing           | y
  z-index                |