added gcc test for __int128
makeing it compatible with older version
changed settings to snb
added old radix sort for 64 bits
pushed the chagnes to make code compile with c++11
fix
added openmp stl sort
fixed
Added all_gather+a2a option
added titan speficifiles
added John Dubinski galactics for IC generation. need patched galactics code
small changes
modified README
fix
added unts to readme
fixed mass scaling
fix
changed seed
reverted back to stop after 64 iters
seed change