Experimental RepRapFirmware 3.01 RC6 Port for LPC

Note: Those upgrading from version 2 need to modify your config files for version 3, see here: https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview

See https://github.com/dc42/RepRapFirmware/blob/v3.01-dev/WHATS_NEW_RRF3.md to see whats new in RepRapFirmware.

RepRap forum thread on V3 of the LPC port: https://reprap.org/forum/read.php?147,859857,page=1

LPC port of RepRapFirmware is experimental - use at your own risk

For anyone using the SBC version of firmware you will need to use V1.3.1 of the DSF the version of this modified for use with LPC based firmware can be found here: https://github.com/gloomyandy/DuetSoftwareFramework/tree/LPC_RRFv3.01RC6

See the above V3 thread for details.