Adding namedtuple containers for Cartesian states to allow name or index access.
Adding namedtuple containers for Cartesian states to allow name or index access.

RethinkRobotics/baxter,umassrobotics/baxter,baxter-flowers/baxter_tools,RethinkRobotics/baxter_examples,wjchen84/baxter_examples,RethinkRobotics/baxter_tools,umassrobotics/baxter,Sannoso/baxter_examples,davetcoleman/sdk-examples,jaspell/baxter_examples,davetcoleman/sdk-examples