VisIT: Depth trick for ssh visualization

[Shin01]

Just found that having the transform > transform z-scale on -0.01
instead of 0.01 will flip the Z axis, so depth is shown as depth
instead of elevation. FYI :)

[Sean]

Yes, that will work. However, you should be aware that this will also
invert your volumes. So if you were doing volume queries and other
integrations that are based on space, you're going to get inverted
values. I also don't know what volume rendering would do to an
inverted volume.

-Sean