* Makefile adapted to changes below.
* split pythonmain.c in two: most stuff goes to pythonrun.c, in the library.
* new optional built-in threadmodule.c, build upon Sjoerd's thread.{c,h}.
* new module from Sjoerd: mmmodule.c (dynamically loaded).
* new module from Sjoerd: sv (svgen.py, svmodule.c.proto).
* new files thread.{c,h} (from Sjoerd).
* new xxmodule.c (example only).
* myselect.h: bzero -> memset
* select.c: bzero -> memset; removed global variable
diff --git a/Include/pythread.h b/Include/pythread.h
new file mode 100644
index 0000000..91bac2a
--- /dev/null
+++ b/Include/pythread.h
@@ -0,0 +1,27 @@
+#ifndef _THREAD_H_included
+#define _THREAD_H_included
+
+#ifdef __STDC__
+#define _P(args) args
+#else
+#define _P(args) ()
+#endif
+
+void init_thread _P((void));
+int start_new_thread _P((void (*)(void *), void *));
+void exit_thread _P((void));
+
+typedef void *type_lock;
+
+type_lock allocate_lock _P((void));
+void free_lock _P((type_lock));
+int acquire_lock _P((type_lock, int));
+#define WAIT_LOCK 1
+#define NOWAIT_LOCK 0
+void release_lock _P((type_lock));
+
+void exit_prog _P((int));
+
+#undef _P
+
+#endif