Piping

[giraffekey]

Xylo currently supports a rudimentary implementation of piping, but it's very buggy.

This code is actually works currently:

root = SQUARE |> ss 100 |> r 45

But for some reason this doesn't:

root = SQUARE |> ss 100 |> rot 45

rot x = r x

Might be related to issue #28. Seems like a common problem comes from the way user-defined functions are implemented, but builtin functions work as intended.