Remove misc. files

- from win32/include/winapi: various .h

  The winapi header set cannot be complete no matter what.  So
  lets have just the minimal set necessary to compile the examples.

- remove CMake support (hard to keep up to date)
- some other files

Also, drop useless changes in win32/lib/(win)crt1.c

win32/lib/wincrt1.c

@@ -9,14 +9,6 @@
 void __set_app_type(int);
 void _controlfp(unsigned a, unsigned b);
 
-#ifndef __TRY__
-    #ifdef _WIN64
-	#define __TRY__
-    #else
-	#define __TRY__ void __try__(void**), *_sehrec[6]; __try__(_sehrec);
-    #endif
-#endif
-
 int _winstart(void)
 {
     __TRY__