killed the now empty ifdef in menu.h. Also removed the define in
the CFLAGS in Makefile.
* Renamed _menui_menu_hook to Menu_Hook for compatiability with
ncurses.
* Renamed all internal functions to have _menui prefix instead of
__menui
* Cleaned up some automatic function variable names that were
shadowing function calls.
* Fixed email address in headers.
jdc