begin work on LaTeX parser.
fix bug in parse loop
accumulate tokens and report if they are too long.
allow \ to terminate a token. generally work on the tokeniser.
tell user how to get fonts when they are missing.
store parsed tokens for later interpretation.
cull debug output
return token stream directly to main function for processing.
remove test pages in output
begin implementing layout engine.
allow specification of book title and pre-title type faces.
set book title and pre-title type faces in ebook profile.
work towards line and paragraph rendering.
add small-caps emulation support.
make white space between things explicitly represented.
implement explicit space notification, including extra space after
a full-stop.