[OneStepMethod]
store reference to linear solver, not copy of the object itself
[DiscreteGridFunction]
repair constructor with shared_ptrs
[VectorGridFunctionSpace]

do VectorGridFunctionSpace working parallel
[BCRSMatrixBackend]
get around the bug in gcc 4.6
Merge branch 'master' of https://git.dune-project.org/repositories/dune-pdelab
[test]
this test can work only with MPI