Revised CPUSolver to account for (n,2n) in keff calculation
Revised VectorizedSolver to account for (n,2n) in keff calculation
Updated build system to build VectorizedSolver with --cc=icpc build option
Updated VectorizeSolver to work with latest release of OpenMOC
Finished updating VectorizedSolver with breakup of simd loops
Revised GPUSolver to account for (n,2n) in keff calculation
Updated GPUSolver::computeKeff doxygen comment
Uncommented out OpenMP pragmas in CPUSolver::computeKeff()
Merged with nu-scatter branch