fracking: fix centering of well labels
Get rid of fracking-old

In general, it's best to avoid keeping old code around. Not least because at least 3 times I edited fracking-old before I realized what I'd done.
Mention the dev site in README
Describe easier python local server in README
Fix some whitespace slop
Add Lab grapher as submodule

This commit intentionally cuts and pastes the same 'dataColors' option to each LabGrapher instantiation in the codebase. This is to untangle concerns so that each model can eventually choose its own colors without affecting other models.
fracking: use well-label colors on graph
fracking: better label colors (from ColorBrewer2)

We can avoid red/green problems now that we have improved visibility