Changed ET configuration to 1 -> 3 -> 2 -> 1 (clockwise) viewed from above

It was 1 -> 2 -> 3 -> 1 (clockwise) viewed from +z towards origin.
Now it's 1 -> 3 -> 2 -> 1 (clockwise) viewed from +z towards origin.

Changed made so that it agrees with http://arxiv.org/pdf/1201.3563v2.pdf.

	modified:   modules/ETdetector.py
	modified:   tests/ETdetector/Detector.py