Updated references to info-nts-05 to info-nts-12.

- Added "percent" as an alternative for "percent-sign".

- Fixed figure and table numbering to not count preceding figures ...

and tables in <answer> when showanswers is off. Still seems to
  count them in <omit> though (and probably also <comment>).

- Images in HTML version now default to 96 dpi. ...

- Resolved merge conflict.

- Ensured that the content of <figure> and <table> is properly centered in HTML. ...

- Added <raw-latex> and <raw-html> as alternatives to <raw-code format="xx">.

- Added "sans-serif" template. ...

- Added "vskip" template.

- Deleted explicit math mode and associated operators after remembering about \ensuremath. ...

- Added <underscore> element for underscores in non-code contexts.

- Added "br" to "newline" template. ...

- Added "dollar-sign" to "dollar" template.
- Changed footnotes into endnotes (moved into meta-stylesheet).
- Renamed modes of "multi-row", "multi-column" cell templates to
  "latex-multi-row", "latex-multi-column", etc., to make it clearer
  that they're only intended for LaTeX.
- Added support for table column headers (TH in HTML). Still needs a
  little work in the main cell template.
- Fixed up custom image directories in the "image" templates. (May
  need further rationalisation.)
- Added >, <, >=, <= operators.

- Shifted footnotes to be endnotes in HTML version.

- Changed output LaTeX formatting of verbatim-inside-minipage for better readability ...

- Removed some old comments and commented-out code

- Added extra lineskips around minipaged verbatim (for code kept on one page) ...

- Added extra whitespace around menu items
 - Changed menu item names to boldface in LaTeX

- Forgot to check it still works before committing. Fixed.

- Made an initial stab at generalising the LaTeX document class, but it's harder than I thought.

- Now correctly processes inline <environment> elements. ...

- Fixed broken "latex-command" template.

Obsoleted metadata as an element, adding warning if document uses it. Now uses attributes of "document".

- Added "percentage-sign" as an option.

Added handling of "basename" attribute (in addition to the element of the same name) for images.

Modified behaviour of code-block for latex to support the new "allow-breaks" attribute for permitting/prohibiting page breaks during a block of code. The \verbatim is wrapped inside a \minipage to keep it all on the one page.

- Added newline-internal template for outputting a line-break into the generated latex/html source ...

- Modified verbatim and code-block to put extra vertical whitespace around the output in latex

- Resolved conflicts with Chris's changes to document title stuff. Maybe it works now?

- Fooled around with verbatim stuff. ...

- Added comment about possibly broken standalone stuff in "document-title" template.

- Added "menu/separator" as a match in menu-separator template.

Added "typewriter" template for problem code markup: LaTeX doesn't like \verb inside \href.

- Added templates for <paper>, <subject-code> and <paper-number> to ensure that they're formatted properly in the output.

Added handling of new attributed-based document metadata.

Added new template for handling "document/title" when in "chapter" mode, used for special "chapters" such as laboratories and tutorials.

- Experimented with using url package for URLs in LaTeX, decided not to bother and documented why.

- Fixed bug in "section-reference" template ("figure" instead of "section").

- Added @valign to <row> and <cell>. ...

- Added <location> to <image> for custom image directories (not that I actually need it yet...).

- Added @latex-placement attribute to <figure> and <table>.