Merge branch 'master' of github.com:ufz/ogs

MathLib/LinAlg/Solvers/DirectLinearSolver.h

MathLib/LinAlg/Solvers/GMRes.cpp

MathLib/LinAlg/Solvers/GMRes.h

MathLib/LinAlg/Solvers/GaussAlgorithm.cpp

MathLib/LinAlg/Solvers/GaussAlgorithm.h

MathLib/LinAlg/Solvers/IterativeLinearSolver.h

MathLib/LinAlg/Solvers/LinearSolver.h

MathLib/LinAlg/Solvers/TriangularSolve.cpp

MathLib/LinAlg/Solvers/TriangularSolve.h

MathLib/LinAlg/Solvers/solver.h

MathLib/LinAlg/Sparse/CRSMatrix.h

MathLib/LinAlg/Sparse/CRSMatrixOpenMP.h

MathLib/LinAlg/Sparse/CRSMatrixPThreads.h

MathLib/LinAlg/Sparse/CRSSymMatrix.h

MathLib/LinAlg/Sparse/CRSTranspose.h

MathLib/LinAlg/Sparse/NestedDissectionPermutation/AdjMat.cpp

MathLib/LinAlg/Sparse/NestedDissectionPermutation/AdjMat.h

...Sparse/NestedDissectionPermutation/CRSMatrixReordered.cpp

...g/Sparse/NestedDissectionPermutation/CRSMatrixReordered.h

.../NestedDissectionPermutation/CRSMatrixReorderedOpenMP.cpp