Update Configuration_adv.h

Increase Z_HOME_RETRACT_MM to 2mm default to avoid end stop not switching during retract.
FWRETRACT in mm/s

Firmware retraction now stores the retract and recover speeds in mm/s
instead of mm/min. This makes it match the units of the maximum
feedrate, and fixes problems with modifying the value via LCD control
panel. From gcode, the values are still taken in mm/min to match the
units of G1 and similar, and they are converted to mm/s before they are
stored.

I also lowered the default retract feedrate to make it less likely to
cause problems for geared extruders when the user hasn’t bothered to
set a reasonable maximum feedrate, though users should be setting both
of these values to suit their hardware.
Added M112
Added estop handling
Added servo pin assignments to Sanguinololu
Sanguinololu servo pins set default disabled
Test and refactor
Update language.h

Added catalan language
Update language.h

Updated to latest version.
fix bug in M200 with multiple extruders
Merge pull request #837 from whosawhatsis/fwretract

FWRETRACT in mm/s
Update Readme descriptions for M200, M207 and M208
Merge pull request #871 from whosawhatsis/fwretract

Update Readme descriptions for M200, M207 and M208
Adjustable Z probe offset, via custom M-code
Allowable range now includes default value
use existing strings
Merge pull request #804 from MissionSt/adjustable-z-probe-offset

Adjustable Z probe offset via custom M-code
Merge pull request #826 from paciotti/patch-1

Configuration_adv.h
Merge pull request #845 from DerSchultze/Sanguinololu-servo

Added servo pin assignments to Sanguinololu
Merge pull request #852 from pixatintes/patch-1

Update language.h