Rather than taking a reference and working with that.

[[Imported from SVN: r9269]]

[[Imported from SVN: r9268]]

[[Imported from SVN: r8637]]

[[Imported from SVN: r8636]]

[[Imported from SVN: r8635]]

[[Imported from SVN: r8634]]

[[Imported from SVN: r8377]]

[[Imported from SVN: r8306]]

[[Imported from SVN: r8305]]

[[Imported from SVN: r8304]]

[[Imported from SVN: r8303]]

[[Imported from SVN: r8182]]

[[Imported from SVN: r8074]]

[[Imported from SVN: r7967]]

[[Imported from SVN: r7889]]

[[Imported from SVN: r7842]]

[[Imported from SVN: r7841]]

[[Imported from SVN: r7840]]

[[Imported from SVN: r7546]]

[[Imported from SVN: r7545]]

[[Imported from SVN: r7544]]

[[Imported from SVN: r7497]]

[[Imported from SVN: r7434]]

[[Imported from SVN: r7433]]

[[Imported from SVN: r7429]]

[[Imported from SVN: r7425]]

remove the TargetSpace parameter of the Cosserat energy class -- Cosserat materials only make sense with RigidBodyMotion values

[[Imported from SVN: r7418]]

It will implement the energy of the elastic Cosserat modell
for continua and shells proposed by Patrizio Neff.  So far
it is only a copy of the harmonic energy, though.

[[Imported from SVN: r7417]]

[[Imported from SVN: r7413]]

using the ideas of Patrizio Neff.

In particular, this code should handle real 3d continua, as well
as Neff-style Cosserat shells.

This initial commit only adds a lot of infrastructure.

[[Imported from SVN: r7339]]

[[Imported from SVN: r7023]]

[[Imported from SVN: r6500]]

[[Imported from SVN: r6231]]

[[Imported from SVN: r6226]]

Compute the local corrections in local coordinates on the tangent bundle now, instead of using the embedding in the surrounding space

[[Imported from SVN: r5985]]

For this now the TangentVector class of S^n has only n components,
while the EmbeddedTangentVector class still has n+1.
The code around it needs to be fixed accordingly.

[[Imported from SVN: r5963]]

out-comment the use of method computeGeodesicDifference.  It currently doesn't work for all target spaces

[[Imported from SVN: r5959]]

[[Imported from SVN: r5938]]

[[Imported from SVN: r5916]]

[[Imported from SVN: r5347]]