copy detectors from previous configuration

[prjemian]

Copy these detectors from previous configuration (~/beamline/dev/jupyter-ht-hedm/seisidd):

    @staticmethod        
    def get_detector(mode):
        """return the 1idPG4 tomo detector for HT-HEDM"""
        det_PV = {
            'debug':       "6iddSIMDET1:",
            'dryrun':      "1idPG4:",
            'production':  "1idPG4:",
            }[mode]
        
        det = {
            'debug'     :  SimDetector      (det_PV, name='det'),
            'dryrun'    :  PointGreyDetector(det_PV, name='det'),
            'production':  PointGreyDetector(det_PV, name='det'),
            }[mode]
        
        from .devices.motors import TomoCamStage
        det.motors = TomoCamStage(name='motors')