BetterColorChange, gulped

As I mentioned in my previous gulp-less pull request, this new iterative lightening/darkening algorithm may take a little more time than the existing one, but it lacks the bias toward the RGB secondaries (while lightening, esp. toward Magenta) or the RGB primaries (while darkening, esp. toward Green) that the Sitepoint algorithm does.

I've also been assuming that every time I make a pull request and there's a problem, what I need to do is close it and make a new one; I was presuming that if I made changes after starting the pull request, that request would not be updated.

Basically, I'm starting to worry that I'm the kind of coder that Dunning & Kruger warned us about (BibleThump); I mean chances are there was some sort of documentation telling me *that* I needed to use gulp, *when*, and *why*, and I just never saw it.