Create README.md
Added Makefile for Arkansas-Razor2
Base diffraction files

The computes that calculated diffraction intensity within a 3D
reciprocal space volume constructed from the MD simulation cell.  See
Coleman et al. (2013) for details.  Here the fix_ave_time_saed outputs
the saed data into a rectilinear vtk file format that can be visualized
using 3rd party visualization software - i.e. VisIt or ParaView.
Merge github.com:scolema3/LAMMPS into Virtual-Diffraction
Added compute_saed_cost.h file
Merge github.com:scolema3/LAMMPS into Virtual-Diffraction
 Fix_ave_time_saed updated
Added Example
Fixed error in compute_xrd.cpp
Fixed comptue_xrd.cpp - indexing error
Added MIC enabled XRD code
Added Stampede Makefile
Add weighted histogram option for fix_ave_histo.*
Fixed example input script
Fixed reporting in compute
Removed reporting comments
Corrected weights in optional args
Edits to compute_xrdmic.cpp

Trying to merge the optimizations reducing the saved data to the MIC
code.
Updated compute_xrdmic to reduce memory requirements
Changed fix_ave_time_saed to allow multiple snapshots -- address issue with box size changes