Merge remote branch 'origin/feature/9220_SetGoniometer_wiki'
Re #8495. Changed call for logging.
Re #8495. Implemented CalibrateRectangularDetector.validateInputs
Merge branch 'feature/8495_in_check_CalibrateRectangularDetector' into develop

Conflicts:
	Code/Mantid/Framework/PythonInterface/plugins/algorithms/CalibrateRectangularDetectors.py

Re #8495