Major enhancements:
A new program, dtop, allows the user to run top across multiple machines
and collate the results in real-time. The default remote commands have
been changed over to ssh from rsh. A test option has been added to all
commands to check if SSH is up and running before attempting an SSH
connection that might otherwise hang. A flag has been added to dsh
allowing the user to copy, execute, and delete a script on all machines
in one step. There are many other small bugfixes and enhancements.
