M0 no longer turns motors off
Updated M18 and M84 as per zpl fork
Don't insist that user provides values for all 5 possible extruders in
M906 command
Added Ormerod 2 sys files
Updated web interface files
Bug fix: M92 command would only set extruder steps/mm if either 1 or 5
extruder steps/mm was provided
Bug fix: Z-homing or bed probing when axis compensation was enabled
caused the X and Y origins to shift
We now mark drives as not homed when we disable them
File info code now supports gcode files generated by Simplify3D
Updated SD card files to latest web interface
Added more comments to config.g
Head movement commands that were in the tfree files have been moved to
the tpre files, to work better when G10 nozzle offsets are used
Refactored printing to strings and web server json response handling in
preparation for adding support for LCD display via serial link
Added a timer to record how long block writes to SD card take
