Project coordinates on sphere to image plane using Projector class.

def project(self, projector = None):
        """
        Project coordinates on sphere to image plane using Projector class.
        """
        msg = "'%s.project': ADW 2018-05-05"%self.__class__.__name__
        DeprecationWarning(msg)
        if projector is None:
            try:
                self.projector = ugali.utils.projector.Projector(self.config['coords']['reference'][0],
                                                                 self.config['coords']['reference'][1])
            except KeyError:
                logger.warning('Projection reference point is median (lon, lat) of catalog objects')
                self.projector = ugali.utils.projector.Projector(np.median(self.lon), np.median(self.lat))
        else:
            self.projector = projector

        self.x, self.y = self.projector.sphereToImage(self.lon, self.lat)