changed mapper from Property to Instance to allow for different mappers
changed mapper from Property to Instance to allow for different mappers

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