Add forgotten transition header for interiornodeconstraints.hh.
Merge branch 'p/gruenich/fixes' of http://git.dune-project.org/repositories/dune-pdelab into p/gruenich/fixes
Replace deprecated GenericReference* by Reference*.
Add space between >> from templates because older compilers dislike that.
Merge remote-tracking branch 'origin/master' into p/gruenich/fixes
Remove unused typedefs.

They cause warnings by GCC 4.8.
[LocalFunctionSpace] Export subspace depth for LFSIndexCache

Due to the recent changes to the way subspaces work, the LFSIndexCache
needs to know how the length of the path from the subspace to the root
of the underlying tree because it needs to remove that portion of the
treeindex before invoking the orderings for the subtree (those expect
to get a shorter DOFIndex than what we have right now, as we have cut
off the upper part of the tree in the subspace).

This patch adds a new method subSpaceLength(), which returns 0 for
regular LocalFunctionSpaces and a positive value for the root
LocalFunctionSpace of the LocalFunctionSpace tree generated from a
GridFunctionSubSpace.
[LFSIndexCache] Use subspace depth information from LFS to fix subspace
index mapping

This patch uses the information exported from LocalFunctionSpace through
subSpaceLength() to set up the DOFIndexViewIterators for the functor
map_dof_indices_to_container_indices with the correct initial tail length
to work correctly for LocalFunctionSpaces of GridFunctionSubSpaces.
[SubOrdering] Remove unused member variables

The member variables of SubOrdering that were required for extending
the DOFIndices to the root of the GFS tree are not needed anymore, so
get rid of them.

We also don't need the LFS TreePath as a constructor argument anymore,
so let's get rid of it as well.
Merge branch 'p/gruenich/fixes'

Some fixex from Christoph. Thank you!

* p/gruenich/fixes:
  Remove unused typedefs.
  Add space between >> from templates because older compilers dislike that.
  Replace deprecated GenericReference* by Reference*.
  Add forgotten transition header for interiornodeconstraints.hh.