Reduce MF2 speed to 36 mm/s

This is to eliminate resonance in the motor axle. Bad resonance may cause missed steps and failed prints.
Reduce MF2 speed to 36 mm/s
Reduce MF2 speed to 36 mm/s
Reduce MF2 speed to 36 mm/s
Reduce MF2 speed to 36 mm/s
Reduce MF2 speed to 36 mm/s
Merge pull request #3 from jkoljo/patch-3

Reduce MF2 speed to 36 mm/s to prevent resonance