RectangularDetector orientation: caller needs to take care of z reflection

Base/Vector/Direction.h

Device/Detector/IDetector.h

Device/Detector/RectangularDetector.cpp

Device/Detector/RectangularDetector.h

Device/Instrument/Instrument.cpp

Tests/Unit/Core/RectangularDetectorTest.cpp

Tests/Unit/Device/RectangularConverterTest.cpp

auto/Wrap/doxygenBase.i

auto/Wrap/doxygenDevice.i

auto/Wrap/libBornAgainBase.py

auto/Wrap/libBornAgainBase_wrap.cpp

auto/Wrap/libBornAgainDevice.py

auto/Wrap/libBornAgainDevice_wrap.cpp