Added several functions (to ctype.h, stdlib.h)

"Optimised" some functions in string.h
Added dynamic libraries support based on sysfunction 68.19 (experimental)

git-svn-id: svn://kolibrios.org@215 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/metcc/trunk/libc/include/stdio.h

@@ -1,6 +1,7 @@
 #ifndef stdio_h
 #define stdio_h
 #include "mesys.h"
+#define NULL (void*)0
 typedef struct {
   char* buffer;
   int   buffersize;