pyne/pyne — pull request #623 by elliottbiondo (2014-12-10 19:58:41+00:00)
Title: read_mcnp_inp now retruns a dict

Originally, this function read an MCNP input, grabbed the materials and returned a list of ```Material```/```MultiMaterial``` objects. I think such a list is an inconvenient and unwieldy data type. I changed this function to instead return a dictionary that maps MCNP material numbers to ```Material```/```MultiMaterial``` objects. I made a few other minor changes along the way.