[test]
test dofIndex of SubSpace
Merge branch 'master' into feature/gridglue
[typetree]
adapt gridglue classes and tests to the typetree changes
[ordering]
update documentation ... TypeTree is not a part of PDELab anymore
Merge branch 'master' into feature/gridglue
Merge branch 'feature/fix-dofindex-in-subspace'

* feature/fix-dofindex-in-subspace:
  [GridFunctionSubSpace] Fix generation of DOFIndices in LocalFunctionSpace of GridFunctionSubSpace
Merge branch 'master' into feature/gridglue