Added pause and resume and corresponding buttons.
Updated liquidcacontroller to use LAB color interpolation instead of saturation to indicated liquid depth.
Added support for showing elevation only or depth only in addition to both elevation and depth.
- Updated liquidcacontroller to use a D3 interpolator.
- Updated colors.
- Updated toggleDisplayMode to render cells immediately after changing mode.
Switched to an orange and green scheme.
Converted pause and resume buttons into a toggle button.
Fixed bug with lightness not actually being set on the LAB color.
Added key bindings for all of the buttons and instructions for that.
Updated explanation.
Updated color interpolation to use two easing functions for each half of the range to get a color distribution that is easier to read that linear interpolation from min to max.
Reworded liquid 'depth' as 'concentration'.