Fork for Embecosm

	* README.md: Add Embecosm message.
	* Marlin/Configuration.h (MOTHERBOARD): Updated for TVRRUG Round 2.
	(DEFAULT_AXIS_STEPS_PER_UNIT): Likewise.

Conflicts:
	Marlin/Configuration.h
Put the correct author and date in there.

	* Marlin/Configuration.h (STRING_VERSION_CONFIG_H): Updated.
	(STRING_CONFIG_H_AUTHOR): Updated.