Remove kaleidoscope

Kaleidoscope will eventually be revived for developing and previewing
colorschemes that don't use on Xresources
Overhaul for portability

Use relative paths to remove dependency on ~/.hakumai/, actually preview
colorschemes with carrousel, allow previews of arbitrary colorschemes as
well as Hakumai colorschemes, abandon lib/transpose in favor of a
default font configuration, and introduce new colortest script rather
than requiring that one be installed by the user.