Added inital UIFC interface to UNIX monitor.

uifcc (curses) can be compiled with USE_SIGNALS to force menus to return
a -2 when a SIGALRM is recieved. This allows for the "real time" display of
the node status.

Issues:
Running umonitor over a network connection can cause keystrokes to be
interpreted erratically.

Cannot use escape to exit auto-refreshed menus.  (Same reason)

Musings:
Perhaps a new WIN_* bit to specify a dynamic menu?