Updated Regression tests
Update output_structure.cpp

variable definition bug for MPI Processing

[NOTE]
It is also needed to fix line 2221 as:
#ifdef WINDOWS
  int rank, iProcessor, nProcessor;
  MPI_Comm_rank(MPI_COMM_WORLD,&rank);
  MPI_Comm_size(MPI_COMM_WORLD,&nProcessor);
#else  
  int rank = MPI::COMM_WORLD.Get_rank();
  int nProcessor = MPI::COMM_WORLD.Get_size();
  int iProcessor;
#endif
Adjoint AoA sensitivity

Correction for Coeff with no explicit AoA dependence
Adjoint AoA sensitivity

Correction for Coeff with no explicit AoA dependence
Added Windows MPI directives
Added Windows MPI directives
Added Windows MPI directives
Repaired output_structure.cpp.
Merge branch 'master' of https://github.com/su2code/SU2
Partially added Windows MPI directives
Few non-standard C++ syntax issues causing Windows compile errors fixed
Added Windows MPI directives
Added Windows MPI directives
Added Windows MPI directives
Added Windows MPI directives
More output_structure.cpp repairs.
Added Windows MPI directives
Finished Windows MPI directives for SU2_CFD
Windows MPI tweaking; pipe with MPI status ---> NULL for now
fix finite differences
Merge branch 'master' of https://github.com/su2code/SU2