typo
Merge pull request #190 from rmcgibbo/typo

typo
Created ThreadPool to simplify parallel code
Added a missing dependency on pthreads
Further optimizations to CPU nonbonded force
Merge pull request #191 from peastman/master

Further improvements to CPU platform
Minor optimizations to CPU platform: avoid applying periodic boundary conditions unnecessarily
Also use the previous optimization with reaction field
Merge pull request #193 from peastman/master

Minor optimizations to CPU platform: avoid applying periodic boundary conditions unnecessarily