add an updated Event and range trait handler to color mappers so plots can react when it updates or changes just like for other mappers
add an updated Event and range trait handler to color mappers so plots can react when it updates or changes just like for other mappers

ContinuumIO/chaco,tommy-u/chaco,tommy-u/chaco,burnpanck/chaco,ContinuumIO/chaco,burnpanck/chaco,ContinuumIO/chaco,tommy-u/chaco,ContinuumIO/chaco,burnpanck/chaco