Added z-probe repeatability check code from:
http://3dprintboard.com/showthread.php?2802-Auto_Bed_Leveling-Z-Probe-Repeatability-code
Basic configuration for my printer, everything appears to be working
Copied commit from https://github.com/crashmatt/Marlin/commit/8170ac347a90dcd893253fe09b0a9cb2750a061a
Allow specifying Z offset to G29
Correct pins for fans add-on board, separate table for my bed thermistor