Aerial Pollution: Add new aerial-view model of air pollution
Fracking: Copy model to fracking-old for hi-res version

Before pushing new low-res faster version, this is an
archived that can be used for comparison.

[#54298936]
Fracking: Reduce size of the model for speed

Model is 1/4 of size and loads and runs faster.

Note: There is an implicit relationship between the size of
the model and many of the properties (speed etc.). Some of
these have been reduced (depth of layers is now a %), but
others still remain, which means they will have to be changed if
model size is changed.

Since model size is a part of the model, we should consider making
model size part of the model definition, not just specified
in the html page.

[#54298936]
Fracking: Limit wells to 3
Update lab grapher to include a fourth color (black)
Fracking: Graph all well outputs on same graph
Fracking: Add methane in water and contaminants graphs
Fracking: increase graph height
Fracking: Change indiv well label color to match graph lines