Get rid of ancient tests that don't work.
Changed Plot derived type to PlotSlice and plotter module to plot.
Initial support for multiple S(a,b) tables. Still need sorting of i_sab_nuclides and i_sab_tables.
Remove assumed short circuit evaluation for S(a,b) tables.
Sort i_sab_nuclides and i_sab_tables. Closes #83.
Some fixes in hdf5_write_materials.
Deallocate names and sab_names in Material derived type.
Changed Vanadium in modified abundances file for split_nuclide script.
Added derivation for reflection off of cones in documentation.
Ability to specify natural elements in materials. Closes #97.
Fixed reaction_name for MT=849.
Added test for <element>.
Added test for multiple S(a,b) tables.
Added description of <element> to user's guide.
Updated release notes.
Changed protocol for git clone in install instructions.
Add checks for redundant unique IDs in user input.
Added cross_sections.xml for MCNP-distributed ASCII cross sections.