Invoke DVO in no-graphics mode

[Michael Wood-Vasey]

It would be convenient to able to invoke DVO in a no-graphics mode, e.g.,

dvo -nox

or something like that. This would be helpful when on slow connections or dealing with large data sets involving commands that would otherwise draw many things to the screen.

[eugene]

it is possible to have all graphical output generated by dvo be constructed only internally. To do this, tell DVO to launch kapa with the -noX option. In DVO, use the variable KAPA to do this:

$KAPA = kapa -noX

[eugene]

The $KAPA redirect ($KAPA = kapa -noX) achieves this result.