[Help-glpk] 4th version on threading patch

[Joonas Timo Taavetti Kekoni]

I have now finnished 4th version of the MT-patch.
It is no longer using thread local storage
for glplib1::*pointer, but
it is using mutex around all access to *env.

(That concept was not only incompatible with GC,
but also bad.)

The changes are now in glplib2.c and glplib1.c is not
changed.

-DPTHREADS and -DWINTHREADS are required in the makefile
to compile in the threading support.

I have also the java dll and gpsol as binary(win32/linux x86).

I have also included ThreadTest.java that can be used to test
with threads.

MPS rutines are still not threadsafe.

http://www.hut.fi/~jkekoni/glpk-t/