This includes, notably, the Developer Notes feature. I did not copy any
SRCUI stuff since this project uses literate documentation, but I'll add it
if it seems like it will be useful. Barely any of the project is written
literately right now.
* .gitignore: `{=>/}config.*'.
* configure.ac (SET_DEVNOTES): New variable.
(AC_CONFIG_FILES): Add `doc/config.texi'.
* doc/.gitignore (config.texi): Ignore (generated).
* doc/Makefile.am (tame_TEXINFOS): Add `macros.texi' and `config.texi'.
* doc/config.texi.in: New file.
* doc/macros.texi: New file containing some macros from `doc/tame.texi' and
some from Liza's `doc/macros.texi'.
* doc/tame.texi: Adjust position of header comment. Include `config.texi'
and `macros.texi'. Add devnotice to header. Strip out macros.
(menu): Add `Concept Index' and conditional `Developer Notes Index'.
(Concept Index, Developer Notes Index): New nodes (latter conditional).