Version 90

Tidying up for the Ormerod 2 firmware release.

Two SD image directories: one for Ormerod 1, one for Ormerod 2
John Stäck's mprovements to the MAC address reading code implemented.
config.g is no longer in the SD images - you have to copy default.g to create it.  Stops accidental overwriting on upgrades.
The machine's name now appears at the top right on the web interface.
G32 now implemented with a macro - edit bed.g in the sys folder to set IR probe target positions.

More to follow...
SD image file names changed to make them more sensible...
Merge remote-tracking branch 'origin/dev' into duet_j

Conflicts:
	SD-image-Ormerod-1/sys/default.g