Rvsfunc

And some REALLY annoying stuff in workflows pertaining to automated releases.
Don't forget how you automate stuff if you do it kids, it's pain

This just adds a WIP function to the thing, but at least automation for releases works now

Stability and documentation for all

This adds some small fixes to old code, as well as implementing a better nnedi3_rpow2 by not requiring the file from the gist

v0.0.4-missing_if