add temp sensor specific settings, like for thermistor Beta, R0, T0
add and save max_pwm and i_max
don't disable extruder on_halt, not needed
Merge pull request #571 from wolfmanjm/add/temp-sensor-settings

Add/temp sensor settings
update firmware.bin
adc is not a module
add split() to utils
allow heaters to not be turned off during suspend
refactor G4 out of slowtickerinto robot,and to not use pauser. Just drain queue and wait for
start G4 timer after queue is empty
Merge pull request #573 from wolfmanjm/add/temp-option-to-suspend

Add/temp option to suspend
Merge remote-tracking branch 'upstream/edge' into grid25level