[Typetree] Apply changes needed because of moving typetree to its own module.

This is mainly the result of.
for i in `find . -name \*.[hc][ch]| xargs grep "PDELab::TypeTree" | cut --delimiter=":" -f 1`; do sed "s/PDELab::TypeTree/TypeTree/g" $i> tmp && mv tmp $i; done
for i in `find . -name \*.[hc][ch]| xargs grep "dune/pdelab/common/typetree/" | cut --delimiter=":" -f 1`; do sed "s/dune\/pdelab\/common\/typetree\//dune\/typetree\//g" $i> tmp && mv tmp $i; done
for i in `find . -name \*.[hc][ch]| xargs grep "dune/pdelab/common/typetree.hh" | cut --delimiter=":" -f 1`; do sed "s/dune\/pdelab\/common\/typetree\.hh/dune\/typetree\/typetree.hh/g" $i> tmp && mv tmp $i; done
Additionally I chaged to occurences of templateclass>> to templateclass> > just to be save.