next try for manual axis movement

replace $ARDUINO_HOME/hardware/tools/avr/etc/arduino.conf with this file

Conflicts:
	Marlin/Configuration.h

Simplified stepper inactive time

Updated SERIAL define to MYSERIAL, because Arduino 1.0 defines SERIAL as 0.

if (millimeters_of_travel == 0.0) => if (millimeters_of_travel < 0.001)
(thanks mooselake)

One for common settings.
One for advanced settings.

Default off.

ON GEN7 there is no temperature reading when power is off.. so Marlin
would kill itself. There seems to be an update from "Traumflug" on GEN7
using standby VCC for thermistors.

- redo disable Beeper if PIN is set to -1

- Added support for ATMega1284

Conflicts:
	README

Needs some work to remove the blocking in read max6675.

Added late z enable. (blddk request)
Only calculate look ahead if >2 moves in buffer.
Removed some FORCE_INLINE to save memory.

Signed-off-by: Erik van der Zalm <erik@vdzalm.eu>