visualising planes, some further config needed on camera perspective.
plane now displays, will develop over multuple planes.
added a const
vol calcualtor should now disregard lowest plane
can slide through each plane with some fancy UI spaff.
Merge branch 'master' of github.com:WarwickPARSE/parse-client

Conflicts:
	PARSE/Measurement/VolumeCalculator.cs
more ui spaf
Merge branch 'master' into bounding-box