[[Imported from SVN: r8236]]

[[Imported from SVN: r8235]]

[[Imported from SVN: r8234]]

[[Imported from SVN: r8233]]

[[Imported from SVN: r8221]]

[[Imported from SVN: r8220]]

[[Imported from SVN: r8219]]

from a Pk-basis to a P1-basis.

Doesn't work beyond P2 yet, I'll fix that in a second.

Should eventually go into dune-solvers.

[[Imported from SVN: r8218]]

[[Imported from SVN: r8217]]

[[Imported from SVN: r8214]]

[[Imported from SVN: r8213]]

[[Imported from SVN: r8212]]

[[Imported from SVN: r8211]]

[[Imported from SVN: r8210]]

[[Imported from SVN: r8209]]

[[Imported from SVN: r8208]]

Quaternion class to the Rotation class.  Rotation axes and
angles are a genuine rotation concept and don't really
belong into a quaternion implementation.

[[Imported from SVN: r8207]]

[[Imported from SVN: r8206]]

[[Imported from SVN: r8204]]

[[Imported from SVN: r8200]]

[[Imported from SVN: r8199]]

[[Imported from SVN: r8198]]

[[Imported from SVN: r8197]]

[[Imported from SVN: r8196]]

[[Imported from SVN: r8195]]

[[Imported from SVN: r8194]]

[[Imported from SVN: r8193]]

[[Imported from SVN: r8192]]

[[Imported from SVN: r8182]]

[[Imported from SVN: r8164]]

[[Imported from SVN: r8162]]

[[Imported from SVN: r8156]]

[[Imported from SVN: r8151]]

[[Imported from SVN: r8150]]

target space classes.  In particular, the coordinate type
now has to be given explicitly.

[[Imported from SVN: r8149]]

It makes it difficult to be sure that an explicitly
requested type is really handed over to every place.

While we are at it: reverse the order of the template
parameters.  Now first comes the type, then the dimension.
This is more like FieldVector and friends, and hence
should be less confusing.

[[Imported from SVN: r8148]]

[[Imported from SVN: r8147]]

[[Imported from SVN: r8146]]

[[Imported from SVN: r8145]]

[[Imported from SVN: r8115]]