b7d571efe2
recently UG has become free software (yay!), so we can now support it with a good conscience. The CMake module is based on the "UseUG.cmake" module of dune-grid but it is quite a bit simpler and actually works. (I cannot see how UseUG.cmake can work without ever including the ug-config*.cmake files...) the UG source code is available here: https://github.com/ugfem/ug