Wwimp class now has vector tags, needs testing.
Tests pass for wwinp vector tags
Meshtally class now uses vector tags, needs testing.
Meshtally vector tests pass.
Changed variable names to eliminate 'voxel'.
Wwimp class now has vector tags, needs testing.
Tests pass for wwinp vector tags
Meshtally class now uses vector tags, needs testing.
Meshtally vector tests pass.
Changed variable names to eliminate 'voxel'.
Merge branch 'vector_tags' of https://github.com/elliottbiondo/pyne into vector_tags
Minor PEP8.
Merge branch 'vector_tags' of github.com:elliottbiondo/pyne into elliottbiondo-vector_tags