Added X and Y z-probe offsets to G31 command
Reworked G31 and G32 to do less work in the step ISR and to support Z
probe on delta printers
Z probe modulation pin is now selected using M558 R parameter instead of
probe type
Incorporated zpl's Network module updates and some of his Gcodes updated
Merged RRP's 0.96 Move code into mine
Added M105 S3, M20 S2 and M36 commands for supporting TFT control panel
Added X parameter to M305 command to allow thermistor channels to be
changed
Removed space after "B:" in M105 response to avoid confusing Pronterface
Added modified lwip files that were missed from last checkin
Fixed incorrect JSON format in response to the rr_files command when no
files were found
Enabled hardware debounce filter on cooling fan RPM pin to get a correct
and stable readout
Fixed bug that caused the cooling fan PWM frequency to be 165kHz. It is
now 25kHz.
Fan RPM is now included in the web interface status response (thanks
zpl).
Many more error messages are now reported to the web interface as well
as the USB interface.
Interrupt-driven network timer task to better cope with slow SD card
writes (thanks zpl)
Module SamNonDuePin is now used for all digital and PWM pin I/O.
