Merge remote-tracking branch 'ogs6-master/master'

MathLib/LinAlg/Solvers/BiCGStab.cpp

MathLib/LinAlg/Solvers/BiCGStab.h

MathLib/LinAlg/Solvers/CG.cpp

MathLib/LinAlg/Solvers/CG.h

MathLib/LinAlg/Solvers/GMRes.cpp

MathLib/LinAlg/Solvers/GMRes.h

MathLib/LinAlg/Sparse/CRSMatrix.h

MathLib/LinAlg/Sparse/CRSMatrixDiagPrecond.h

MathLib/LinAlg/Sparse/CRSMatrixOpenMP.h

MathLib/LinAlg/Sparse/CRSMatrixPThreads.h

MathLib/LinAlg/Sparse/CRSTranspose.h

MathLib/LinAlg/Sparse/SparseMatrixBase.h

MathLib/LinAlg/Sparse/amuxCRS.cpp

MathLib/LinAlg/Sparse/amuxCRS.h

MathLib/sparse.h

SimpleTests/MatrixTests/CMakeLists.txt

SimpleTests/MatrixTests/MatTestRemoveRowsCols.cpp

...leTests/SolverTests/ConjugateGradientUnpreconditioned.cpp