Added MPI Benchmark application

Change-Id: I36bcdf8a5172beb7e374ae06c2590b948da4158c
Minor cleanups.

Change-Id: If08c19b42a189bde53821f3f0f19712683c1748d
Merge pull request #4 from tribal-tec/review

Fix stream synchronization and dispatch rate
Fix exit

Change-Id: I5da869c729c668c0fadaa74f5e83aac3bf81c78b