change all 'mapper' to 'mpr' for consistency in python tutorial
change all 'mapper' to 'mpr' for consistency in python tutorial

malloch/libmapper,radarsat1/libmapper,radarsat1/libmapper,libmapper/libmapper,malloch/libmapper,radarsat1/libmapper,radarsat1/libmapper,libmapper/libmapper,libmapper/libmapper,libmapper/libmapper,malloch/libmapper,libmapper/libmapper,libmapper/libmapper,malloch/libmapper,radarsat1/libmapper,malloch/libmapper,malloch/libmapper