Removed runner from SolverInterface and Preconditioner from RunnerInterface

src/amdis/BiLinearForm.hpp

src/amdis/BoundaryCondition.hpp

src/amdis/LinearAlgebra.hpp

src/amdis/linearalgebra/AttributeSet.hpp

src/amdis/linearalgebra/DOFMapping.hpp

src/amdis/linearalgebra/LinearSolver.hpp

src/amdis/linearalgebra/LinearSolverInterface.hpp

src/amdis/linearalgebra/ParallelIndexSet.hpp

src/amdis/linearalgebra/RunnerInterface.hpp

src/amdis/linearalgebra/mtl/KrylovRunner.hpp

src/amdis/linearalgebra/mtl/MatrixBackend.hpp

src/amdis/linearalgebra/mtl/UmfpackRunner.hpp

src/amdis/linearalgebra/mtl/VectorBackend.hpp

test/ParallelIndexSetTest.cpp