A lot was changed in support. The short of it is that we now think towers should be on by default, but aren't _completely_ certain about it. It makes more sense to do make this change before the beta rather than just before stable, so we have a chance to revert should it prove disastrous.
The end gcode contained a typo (a rogue N was in front of the G10 P1 S0), and updated it to work a little bit better (now retracts, uses M106 S0 instead of M107, and moves out of the way quicker, and deselects the tool properly)
