Reverted the unnecessary include of changes to constraint.cpp and constraint_tcl.cpp.
Put the archcompute for CUDA 1.1 back in.
Fixed C++ MPI recognition.
Corrected the _cuda_check_errors function with Axel's help.
Merge branch 'master' into Merged_EK

Updated branch with latest master
Minor change testing the reaction propulsion system.
Single node velocity output for electrokinetics.