Text attributes have been rewritten as bit flags, so for example instead of
"BoldUnderline" you'd have to define "Bold | Underline" in your theme
settings.
Requested in #21
This seems to be a bug with debian's troff renderer; tables spanning
more than one page were silently dropped and were not visible.
tbl(1) says to use the macro .TS H with .TH to define the headers but
this is not supported in debian nor openbsd's mandoc implementation.
