Make implicit int of main() explicit.
Reorganized all compiler output into VS2003/Win32.
Fixed freegetopt/getopt.c to heed optind on entry.
Added option handling (-V, -f, -F etc) to mkd2html.
Simplified project dependencies.
Allow enumerated (alpha and number) in ")" form:

1. item
a) item

1) item
a. item
Use single dash option `-css`, `-footer`, `-header`.
Upgrade to `discount` version 2.1.6.