temperature is reset every time you open a file

[kylemcdonald]

every time you open a new file, the platform and extruder temperatures are set back to 0.

i thought my calibration was wrong so i kept switching back and forth between printing and recalibrating, which caused the head to keep cooling down and warming up, which seemed to take a while.

eventually i figured out it was the other bug #224 causing the bad calibration.

[cibomahto]

Fixed here:
bc288b7

[kylemcdonald]

omg you're my hero. testing this tomorrow.