resolve callbacks.

functions when an excpetion is pending.

Some work still needs to be done on js_msgbase.c,  js_user.c, and mailsrvr.c

---
> 	JSVALUE_TO_STRING(cx, argv[0], str);
> 	if(str==NULL)

Only js_ValueToStringBytes() still leaks.

      on the floor of Deuce's computer room
Cyan: Rob's on his way
* Deuce throws his coffee on it.

bugs.

complete the list of supported modes here. "stdio" uses uifcx interface.

initialized (or not).
Report error if attempt to use UIFC method before initialization.