Inline Rules of Thumb and Calibration Routines

[jtranoleary]

e.g.
require "machine is 3d printer";

or

enforce "bleed matches target";

For the first one, this is probably important because we don't want to be doing plotting workflows with anything else but a plotter, for example.

The second one is more up in the air. I will have to think about the design, maybe it's not just a one-liner and instead has block scope around the code that will be transformed through the calibration routine. Maybe we should call this something else, like, transformable block or calibratable block or calibration-responsive block.

(bleedMatchesTarget) {
  // Updatable subroutine goes here.
}