Merge branch 'Marlin_v1' into Prusa_Half-Breed

* Marlin_v1: (114 commits)
  use existing strings
  Allowable range now includes default value
  Adjustable Z probe offset, via custom M-code
  Update Readme descriptions for M200, M207 and M208
  Change CONTROLLERFAN_PIN for board 35 to -1, as it would conflict with board's 33 extruder pin, causing burnout (it's the same board, just different number of fans/extruders, therefore should be pin-compatible)
  fix bug for dual extruders not working
  fix bug in M200 with multiple extruders
  fix bug in M200 with multiple extruders
  thermistortables.h: Add comments that table 60 uses beta=3950.
  Bugfixes for language option 6 (russian)
  semantic changes in language.h
  Corrections for preheat extension in language.h
  Extended Preheat options
  Individual extruder flow rate
  FWRETRACT in mm/s
  Add support for disabling encoder control for feedrate multiplier
  Added CHDK support
  Added CHDK support
  Fixed finnish translation
  Only increase EEPROM version for DELTA printers.
  ...

Conflicts:
	Marlin/Configuration.h
	Marlin/createTemperatureLookupMarlin.py
	Marlin/pins.h
	Marlin/ultralcd.cpp