Fixed clib's GNUmakefile to build without mt19937ar.c.

git-svn-id: svn://localhost/projects/clib@223 c24b926b-5ef4-9a42-8c70-094e0699c819
Add definition of BITMAPINFO for gcc in Linux

Probably we should not depend on Windows bitmap.
Remove duplicate typedef in TexSphere for gcc build

Gcc apparently does not allow duplicate typedef in a class definition.
dedsvr: Add libpng to link target in GNUMakefile

Also fixed some codes to build with gcc.
Specifically, png.cpp is created to separate PNG adaptation codes in
material.cpp which depends on JPEG and Windows bitmaps.  I don't need
them yet in the dedicated server.
dedsvr: Temporarily disable gltestdll.so
clib: Make UnZip.c build with GNUmakefile
dedsvr: Make Warpable.cpp build with gcc
dedsvr: Add RStation.cpp to build target and make it compile with gcc
Merge branch 'clib' into next2