added automatic native registration

added string include file
renamed typeutil and its functions
redid a bunch of the string natives
string natives now register

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40238

sourcepawn/include/sp_typeutil.h

@@ -3,11 +3,11 @@
 
 #include "sp_vm_types.h"
 
-inline cell_t ftoc(float val)
+inline cell_t sp_ftoc(float val)
 {
 	return *(cell_t *)&val;
 }
-inline float ctof(cell_t val)
+inline float sp_ctof(cell_t val)
 {
 	return *(float *)&val;
 }

sourcepawn/include/sp_vm_types.h

@@ -7,6 +7,8 @@ typedef	uint32_t	ucell_t;
 typedef int32_t		cell_t;
 typedef uint32_t	funcid_t;
 
+#include "sp_typeutil.h"
+
 #define SP_MAX_EXEC_PARAMS				32	/* Maximum number of parameters in a function */
 
 /**