cale bradbury

Could we have these files in the main hedron repo? Makes sense to include anything needed for upgrading in a PR that would require it

This looks amazing, am I right in thinking that this would remove a lot of the `r`/`u` calls since vars are just inherently bound? Regardless of that the speed gain...

Would this make sense to implement as shift keys? Folks may have reasons to set up multiple shifts

Index could be a way to go about it, but I think some kind of deeper reference may be safer in case a shift key is removed or inserted

Yeah, a confirmation that warns it will also delete links would be ace

Hella late, but heads up that this is fixed by calling `renderer.pushTextures()` after setting the texture to `inputImage` 

Made a [little pr](https://github.com/msfeldstein/interactive-shader-format-js/pull/51) to add this to the README