Removed SolverCategory and VectorState

src/amdis/DOFVector.inc.hpp

src/amdis/linearalgebra/CMakeLists.txt

src/amdis/linearalgebra/Communication.hpp

src/amdis/linearalgebra/Constraints.hpp

src/amdis/linearalgebra/DOFMapping.hpp

src/amdis/linearalgebra/LinearSolver.hpp

src/amdis/linearalgebra/MatrixBase.hpp

src/amdis/linearalgebra/SolverCategory.hpp

src/amdis/linearalgebra/Traits.hpp

src/amdis/linearalgebra/VectorBase.hpp

src/amdis/linearalgebra/VectorState.hpp

src/amdis/linearalgebra/eigen/Constraints.hpp

src/amdis/linearalgebra/eigen/MatrixBackend.hpp

src/amdis/linearalgebra/eigen/Traits.hpp

src/amdis/linearalgebra/istl/Constraints.hpp

src/amdis/linearalgebra/istl/MatrixBackend.hpp

src/amdis/linearalgebra/istl/Traits.hpp

src/amdis/linearalgebra/mtl/CMakeLists.txt

src/amdis/linearalgebra/mtl/Constraints.hpp

src/amdis/linearalgebra/mtl/MatrixBackend.hpp