In particular, I can use math.cos in the initial values.

[[Imported from SVN: r9808]]

[[Imported from SVN: r9803]]

[[Imported from SVN: r9802]]

Newer versions of ADOL-C do not define 'overwrite' anymore, hence there
is no risk of macro clashing.

[[Imported from SVN: r9798]]

[[Imported from SVN: r9797]]

[[Imported from SVN: r9796]]

That way, we can now control what vertices are Dirichlet and Neumann without having
to recompile the code.

[[Imported from SVN: r9794]]

This will eventually allow to not hard-wired the Dirichlet vertices
into the C++ code, and change them without recompiling.  This also
means we can remove some preprocessor switches.

Currently, though, the Python code is still hard-wired, so we are
only half-way there.

Note that this patch may break several test problems.  I did not test
all of them.

[[Imported from SVN: r9793]]

[[Imported from SVN: r9789]]

[[Imported from SVN: r9787]]

[[Imported from SVN: r9780]]

[[Imported from SVN: r9775]]

[[Imported from SVN: r9774]]

Make its DirichletValues function a proper Dune VirtualFunction.

Prescribe Dirichlet values for the transverse director, as Neff
does it in his papers.

[[Imported from SVN: r9773]]

Christian Engwer told me a trick how to get the mpiHelper instance without
known argc and argv.

[[Imported from SVN: r9720]]

[[Imported from SVN: r9709]]

[[Imported from SVN: r9708]]

[[Imported from SVN: r9702]]

[[Imported from SVN: r9701]]

[[Imported from SVN: r9670]]

[[Imported from SVN: r9669]]

[[Imported from SVN: r9667]]

[[Imported from SVN: r9664]]

[[Imported from SVN: r9660]]

[[Imported from SVN: r9659]]

[[Imported from SVN: r9657]]

This prepares for a later switch to a second-order basis

[[Imported from SVN: r9656]]

[[Imported from SVN: r9655]]

[[Imported from SVN: r9654]]

[[Imported from SVN: r9653]]

Use its size rather than the number of grid vertices

[[Imported from SVN: r9652]]

Adjust values of the shearing/wrinkling problem to the values given in the Taylor/Bertoldi/Steigmann paper

[[Imported from SVN: r9651]]

[[Imported from SVN: r9649]]

[[Imported from SVN: r9614]]

[[Imported from SVN: r9551]]

[[Imported from SVN: r9550]]

[[Imported from SVN: r9548]]

[[Imported from SVN: r9547]]

[[Imported from SVN: r9546]]

[[Imported from SVN: r9545]]