Progress toward mesh to mcnp geom.
Merge branch 'staging' of https://github.com/pyne/pyne into mcnp_mesh
Working version of mesh_to_geom.
mesh_to_geom tests written and passing.
Added example of pyne.ace usage in an ipython notebook.
Fixed doc string, eliminated superfluous len() calls.
Removed accidently committed change.
Merge branch 'mcnp_mesh' of https://github.com/elliottbiondo/pyne into elliottbiondo-mcnp_mesh
fixed parameters typo