#7 session saving

[bishop]

A few users have thought the idea of having a
pre-configured dzt terminal would be great. Open up a
dzt with that configuration and it comes up with a set
of tabs that are pre-named, pre-ordered, with preset tasks.

Combined with the 'screen' command it would be one
spiffy feature. Allowing the upgrading to a new
version of dzt or a reboot while not loosing all the
work put into making the dzt windows perfect.