port of @ceorron's Zip Sort

[landfillbaby]

from @ceorron's stable inplace sorting algorithms repo
untested (i've still got no hard drive) but should be functional since it's just a reworking of the original C++ implementation
you might want to change the highlighing and delays, maybe even add highlighting in a couple of places i missed (comparisons in the merge)
i made its stack 512 ints instead of 2048 bytes, but maybe it could be configurable to simulate different int sizes
might add merge sweep sort later

[landfillbaby]

oh oops. the rebase deleted ceorron's comment of approval
https://github.com/landfillbaby/ArrayVisualizer/commit/78a7d5bd521d1b6de8f7f9e91da5f90c0533fded#commitcomment-39671983

[landfillbaby]

i messed up some idefinitions of len when merging the 2 functions in 6bc05ff