Matt Mets' temperature commits break cupcake heated buildplatform thermistor

[koenkooi]

After updating my extruder fw from last weeks git to todays git I my hbp doesn't turn on anymore.

If I then do 'git rebase -i 7f8a6c7' and remove all temp commits and the toolstatus one everything works as expected again.

[kintel]

I just discovered this yesterday and Matt is on the case.
A quick workaround for now is to comment out line 111 in v2/src/Extruder/Heater.cc:
// fail();

[cibomahto]

Sorry about that! I think I've addressed this in #69. I tested the code both on the gen4 electronics with a thermocouple-based extruder and heated build platform, and on gen 3 with thermistor extruder and heated build platform.