minor reorganization...
Merge branch 'master' of github.com:tobeycarman/ddtv

Grabbing the updated readme from github...
A start at some Sankey diagrams

I think these might be pretty useful for visualizing fluxes.
As is, these are rough. I have not figured out how to manage
matplotlib's Sankey very well, so these are not very readable.
Also the layout is really brittle and seems to behave oddly w/
differeing quantities.