curses key symbols
* Fixed behaviour of the menu window handling. The library no longer
creates the subwindow or window which is correct behaviour as documented
in the ETI library documentation.
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.
blymn