The code to ignore the "bad thermistor reading failsafe"
suicide function depends on the existing of the PS_ON pin
feature.  But in some boards this shouldn't be the case
Fix this by adding an explicit definition to make our
intentions more clear and separable.

Fix build on Sanguino based boards with ATmega1284P

Fix Makefile

Included AD595 calibration options. (daid)

Split ramps1.3 in Sprinter like config and multiextruder config.

Added M221 extuder multiply factor.

I find that the PID routine works better when the cooling fan is switched on
at the beginning of a warm up routine.  Otherwise when you enable the fan
just before a print, you have a delay as the PIDre-adjusts.

This should also be safer as most cooling fans are directed at the hot -ends
thermal barrier!

Instead of a single pre-heat, now there is pre-heat ABS and PLA options
Added defines to the configuration file to adjust preheat temperatures for both

Updated the Xsteps ... settings via the LCD menu

Signed-off-by: Blair Thompson <mail@justblair.co.uk>

next try for manual axis movement

Added a workaround.  Ramps SD card does not have sdcarddetect.  My temporary solution is to add a momentary swtich
that pulls down the SDCARDDETECT pin and mimicking the pull and reinsert ofa a SD card

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

Conflicts:
	Marlin/Configuration.h