BUGFIX:
- now passes the official expressions test suite given in the RS274NGC
standard
- fixed a ton of small bugs, now works just like in the standard.
UPDATE:
- relaxed %4.2f to %4.4f as the first stage of moving away from the
former
- GCODE_DEBUG[_RAW] are still printing the old style, for now.
Housekeeping:
- TODO updated