IntegratedViewer is currently a pure astrodendro.Scatter clone

gonna make it less of a clone next.
Wrote most of the basic plotting code for integrated_viewer!
Revised how the y-cropping works on the l,v plot.
The integrated auxiliary viewer WORKS <3!!!!

I'll probably make it smaller and perhaps make the contours opaque/filled, etc...
More workable size for the IntegratedViewer, for my screen.

especially since it's just a side plot attached to a main viewer!
Implemented multiple_linked_viewer_demo; it's simple and straightforward!
Fixed typo in comment.
Attempted solution to "the flux array is in horribly wrong units"

we're shooting for K km/s deg2
with the goal of converting that to K km/s pc2
when we have distances determined properly.
Assigning correct units to the output columns of reid distancer.
Wrote the mass & virial-parameter assigning math.

I think it really really works??
Included all the new code into the demo! I can demo EVERYTHING now!!