[[Imported from SVN: r8021]]

bugfixes and remove inheritance from basisgridfunction again...this class could be replaced by a fufem-BasisGridFunction if the GfeTestBasis returns TangentVectors instead of EmbeddedTangentVectors

[[Imported from SVN: r7988]]

make function inherit from basisgridfunction again, at least as long as localInterpolation with LocalGfeTestFunctionFiniteElement doesn't work properly. Sorry for the toing and froing 

[[Imported from SVN: r7977]]

[[Imported from SVN: r7974]]

[[Imported from SVN: r7972]]

[[Imported from SVN: r7946]]

[[Imported from SVN: r7939]]

Make the local bases of each tangent space only count as one global (block) dof. This way one gets a global block structure in the tangential stiffness matrix. Note that now the local assemblers have to know this special local structure.

[[Imported from SVN: r7937]]

[[Imported from SVN: r7918]]