colorScale will change its returned scale value based on how many times it has looped
Use lighten instead of darken.  Use hsl
Removing unneeded instance vr
Use lightenColor
Remove semicolon
darkened -> lightened
colorScale test
Adding lighten darken unit tests
Factor out magic number
Changing test name
Changing color constant / legend uses colorScale.scale
Merge branch 'develop' into colorGenerator

Conflicts:
	plottable.js
	src/components/legend.ts
expose lightenAmount in function/colorScale
underscoring private var
Merge pull request #1314 from palantir/colorGenerator

[ColorScale] - Mapped colors due to scale looping are more evident