Added ability to treat area outside lattices as filled with a material
Cleaned up whitespace and comments
fixed lattice_outside so that distance_to_boundary tracks as expected
Changed universe on new coord for lattice outside to be the same as previously
removed SCORE_DIFFUSION tally from the code, code will report a fatal if used for a while
Added support for VTK file creation from voxel plot dumps
Added geometry plotting detail to users guide
Changed atr plot to smaller png
Added VTK support to statepoint 3D file generator
Removed extraneous code
Added tally visualization detail to usersguide
Added note about h5py in usersguide
Added check for particle on upper_right of lattice
Updated 2D example in tally plotting usersguide
Updated 3D example in tally plotting usersguide
Updated statepoint_3d.py usage in usersguide
Fixed typo in usersguide for monoenergetic source
Fixed bug in use of free gas scattering for H-1.
Adjust physical constants to match CODATA 2010.
check for absolute precision issues when neutron distances to lattice surface and global surface are very small and close