Added plot_tally_data.py
added new function to extract data and made script compatible with revision 7 temporarily
bin info is now saved in data dictionary when extracting results
reads in statepoint and process source distribution for gnuplot
L-2 norms between reference and statepoints are now calculated
updated plot_mesh_tally.py
Update instructions for MPICH2/OpenMPI.
Change abundances.txt so each element sums to 1.
Update isotopic abundances to IUPAC 2009.
continued debugging loafs consistency issues
Merge branch 'master' into loafs
initial add of loafs tally integration
removed commented lines of code
Merge remote branch 'upstream/master'
Rewrote readme.rst.
Fixed license section in readme.rst.
Updated mailing list link in readme.rst.
Updated a few things in documentation.
Change statepoint_batch to type(SetInt).
Added source_write option to inhibit writing source sites in state points. Closes #153.