Do not fall back to 'harmonicmaps.parset' by default.

[[Imported from SVN: r10018]]

[[Imported from SVN: r10017]]

[[Imported from SVN: r10016]]

[[Imported from SVN: r10015]]

[[Imported from SVN: r10014]]

[[Imported from SVN: r10013]]

[[Imported from SVN: r10012]]

[[Imported from SVN: r10011]]

... so much difficult code obsolete now... AD rocks...

[[Imported from SVN: r10010]]

[[Imported from SVN: r10009]]

[[Imported from SVN: r10008]]

This is much more flexible and *much* easier to use.

Along the way, this patch scraps several old hard-coded Dirichlet boundary
values.  I don't even remember what they were good for.  If they are needed
again they should also be reimplemented in Python.

[[Imported from SVN: r10007]]

According to Christof Melcher, this produces a field of topological
charge q=1  (or -1, not sure).

[[Imported from SVN: r10006]]

[[Imported from SVN: r10005]]

[[Imported from SVN: r10004]]

[[Imported from SVN: r10003]]

[[Imported from SVN: r10002]]

[[Imported from SVN: r10001]]

[[Imported from SVN: r10000]]

[[Imported from SVN: r9999]]

[[Imported from SVN: r9998]]

[[Imported from SVN: r9997]]

Described in:
 Christof Melcher, "Chiral skyrmions in the plane", Proc. of the Royal Society, online DOI DOI: 10.1098/rspa.2014.0394

[[Imported from SVN: r9996]]

[[Imported from SVN: r9995]]

[[Imported from SVN: r9994]]

    
This removes a compiler deprecation warning.  By using the usual preprocessor magic
we retain compatibility with the dune 2.3 release.

[[Imported from SVN: r9993]]

[[Imported from SVN: r9992]]

There is no need to have our own implementation for this, we had it purely for
historical reasons.

Also, this change fixes a subtle bug:  Our own implementation used AlienElementLocalBasis,
which returns zero if the LocalBasis is evaluated outside of the reference element.
However, this happened sometimes due to rounding error on grids with very small quadrilateral
elements.

[[Imported from SVN: r9991]]

[[Imported from SVN: r9990]]

[[Imported from SVN: r9989]]

[[Imported from SVN: r9988]]

[[Imported from SVN: r9987]]

[[Imported from SVN: r9986]]

[[Imported from SVN: r9985]]

[[Imported from SVN: r9984]]

[[Imported from SVN: r9983]]

[[Imported from SVN: r9982]]

[[Imported from SVN: r9981]]

[[Imported from SVN: r9980]]

[[Imported from SVN: r9979]]