Add support for disabling encoder control for feedrate multiplier

Added CHDK support

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.

Signed-off-by: Matthew Schick <matthew.schick@gmail.com>

Added CHDK support to take pictures instead of doing an IR command, see more about how to use it here http://captain-slow.dk/2014/03/09/3d-printing-timelapses/

Added so M240 can be used to trigger CHDK instead of sending an IR signal, see more about CHDK here http://captain-slow.dk/2014/03/09/3d-printing-timelapses/

Increase Z_HOME_RETRACT_MM to 2mm default to avoid end stop not switching during retract.

Fixed Finnish translation

- Fixed Few finnish transalations
- Removed duplicate contrast define

temperature.cpp: Fix PID_DEBUG compile error.

Update README.md with Autotemp typo fix

Add M665 to dynamically set delta configuration

Conflicts:
	Marlin/Marlin_main.cpp

Various typo fixes #5 - only in comments, no code changes.

Various typo fixes #4 - only in comments, no code changes.

autretract fix

Clarify which PID values to enter

Update menu plan

Fixed typo.

Various typo fixes #3 - only in comments, no code changes.

I made these changes previously, but I can’t find the commit now. This
reapplies the changes to get auto retract working again.

Conflicts:
	Marlin/Configuration_adv.h
	Marlin/Marlin_main.cpp

Updated gen3+ board pins names to current convention

Users can be confused as to which values to enter after a PID tune. Updating the message to help clarity it.
New message: "PID Autotune finished! Put the last Kp, Ki and Kd constants from above into Configuration.h"

Old message: "PID Autotune finished! Put the Kp, Ki and Kd constants into Configuration.h"

Auto bed leveling at arbitrary points

Fixed compiler errors on Ubuntu using arduino-core

Use constants instead of numeric literals

Prevent G29 without first homing in X and Y

If position is unknown, then G29 can be dangerous.