Added verification targets to Maekfile

The Makefile now contains a complete set of "verify" targets to verify
that everything has been written correctly to the chip.  These targets
include verify-all, verify-fuse, verify-flash, verify-eeprom, and
verify-lock.  These new targets simply verify whatever has been
written by the corresponding install-* target.

Also, the command to copy the EEPROM has been changed to ensure the
EEPROM start address is set to 0 which solves a compatibility issue
with some versions of avrdude.
Added autoscroll option to date format

A user may optionally show the date at regular intervals of 10, 30, or
60 seconds.  This parameter can be set in the menus under "cfg regn" /
"date fmt"; available options are "auto off", "auto  10", "auto 30",
or "auto  60".