[opendemo-devel] JK2 support added

[Dr. U. G. <Uwe...@ph...>]

Hello!

I added over the week-end JK2 support in OpenDemo. The state is as follows:
* I got the SDK2, checked in the source
* added opendemo directory
* made it compile cleanly (#include "..\.." -> #include "../..")
* added hints in all the overhead files (doc, wpurc, README)
* created the DTD
* added some of the more important entity fields

I didn't check it at all. In fact, I'm not having the game yet (which will
change later today).

Please try it out too!

BTW, it becomes more and more easy to add a new game: changes are usually:
include od_public.h, one define in g_main.c (to activate the own vmMain entry),
one define in g_syscalls.c (to deactivate the syscall wrappings in this file,
actually it is not necessary to do it, if we can only generate qvm files)
and patching bg_lib.c (for the printf extensins). That's it.

Bye, Uwe