[functions.interfaces] remove obsolete default argument
Revert "[functions.interfaces] remove obsolete default argument"

This reverts commit e0d779efaf6230ad138e536672e0ed70b4c91c5a.
Merge branch 'libdunestuff-functions-problem' of http://users.dune-project.org/repositories/projects/dune-stuff into libdunestuff-functions-problem
[functions.interface] change JacobianRangeType
* Set it to double for matrix valued functions.
  This has to be changed once someone encounters
  matrix vlaued basis functions...
[functions.interfaces] instantiate all combinations