[[Imported from SVN: r9927]]

That code was buggy, and we only didn't see that because the wrong sizes
were always overwritten by the correct ones before being used.
(That's so as long as you call a reducing method before 'scatter').

Removing the code leaves the situation as bad as before, but it
allows us to get rid of the nOwnedLocalEntity() method from the global
mapper.

[[Imported from SVN: r9926]]

In particular this means having to carry mappers for the local indices around.
This makes the code more verbose, but it also makes it easier to see what is
happening.  While coding this stuff I keep having doubts about whether all
the renumbering works correctly...

[[Imported from SVN: r9925]]

The global indexing infrastructure does not currently support P3 spaces.

[[Imported from SVN: r9924]]

[[Imported from SVN: r9923]]

The local copy was to get the thing developed and working.  Now that it is
working we upstream it into dune-grid.

[[Imported from SVN: r9922]]

The IndexSet interface class from dune-grid doesn't have it, and we want
to be like the interface method as much as possible.

[[Imported from SVN: r9921]]

[[Imported from SVN: r9920]]

That's what this method is called in the dune-grid IndexSet
interface.

[[Imported from SVN: r9919]]

[[Imported from SVN: r9918]]

[[Imported from SVN: r9917]]

Yes it is to be moved to dune-grid, but for the transition it is
easier to use the one from this module.

[[Imported from SVN: r9916]]

[[Imported from SVN: r9915]]

[[Imported from SVN: r9914]]

[[Imported from SVN: r9909]]

Use MPIHelper instead.

[[Imported from SVN: r9908]]

[[Imported from SVN: r9907]]

[[Imported from SVN: r9906]]

[[Imported from SVN: r9905]]

[[Imported from SVN: r9903]]

[[Imported from SVN: r9902]]

[[Imported from SVN: r9901]]

[[Imported from SVN: r9899]]

As of yet completely untested

[[Imported from SVN: r9898]]

[[Imported from SVN: r9897]]

The implementation uses TinyXML2.  If you don't have that installed
then a NotImplemented exception will be thrown.

The code is still pretty fragile, and needs more defensive programming.
It will probably crash on a number of well-formed files.

[[Imported from SVN: r9896]]

[[Imported from SVN: r9895]]

[[Imported from SVN: r9894]]

It is not used anymore.  On the other hand, I want to get rid of 
GeometryGrid in the CosseratVTKWriter.  Now with the new VTKFile
at hand there is a chance.

[[Imported from SVN: r9893]]

[[Imported from SVN: r9892]]

[[Imported from SVN: r9891]]

[[Imported from SVN: r9890]]

This is needed for projection-based finite elements.

The code in this patch has not been tested yet.

[[Imported from SVN: r9887]]

[[Imported from SVN: r9886]]

dune-solvers actually does provide a way to set these matrices directly.
I simply didn't find it until recently.

[[Imported from SVN: r9885]]

Currently, the only use of FD is to double check the derivatives computed
either by hand-written code or (more frequently) by automatic differentiation.
However, only multiprecision number types allow to really be sure that the
rounding/cut off errors of FD do not hide subtle errors.

Unfortunately, this patch doesn't go all the way.  It now won't run with 'double'
anymore.  Also, user code needs to be modified in small but inelegant ways
(e.g., no 'std::' prefixes for math functions).  Since the FD tests don't
have to be run every day that's okay for now.

[[Imported from SVN: r9884]]

[[Imported from SVN: r9883]]

[[Imported from SVN: r9882]]

[[Imported from SVN: r9881]]

We are using stuff from there.

[[Imported from SVN: r9880]]