Allow for Gcodes with numerical values higher than 255 in Switch module
Initialise actuator positions to current cartesian position (X0 Y0 Z0) so the first move is correct if homing is not performed. Addresses issue #333
Merge branch 'edge' into feature/Homing-and-Actuator
Actuator: add rate_ratio field. Stepper: use Actuator::rate_ratio instead of calculating rate ratio every speed update