use ordinal scale for non-linear stuff, tweak linear scale to be colourblind friendly
use ordinal scale for non-linear stuff, tweak linear scale to be colourblind friendly

fixes #3

milliondollargraveyard/milliondollargraveyard.github.io,milliondollargraveyard/milliondollargraveyard.github.io,milliondollargraveyard/milliondollargraveyard.github.io