Lightweight Java Game Library Code

Kill off automake/autoconf/libtool build system and replace by a much simpler Makefile

Fixed memory leak

Added floating point extensions

Converted native code from C++ (.cpp files) to C (.c files), thus avoiding an annoying dependency on the standard C++ library on Linux. We weren't using any particular C++ features anyway.

Fix linux makefiles

First GL 2.0 Extensions

Move native stub initialization from extgl into GLContext.java. Makes it much easier to
exlude extensions classes. Furthermore, GLContext.useContext(null) can now be used to
reset the native stubs when no context is current.

header unification

Various fixes

New extensions and static import modifications