updated the changelog

CHANGELOG.md

@@ -7,6 +7,12 @@
   `Function` and `VirtualFunction`.  In downstream codes, these should be
   replaced by C++ function objects, `std::function` etc.
 
+- Python bindings have been moved from the `dune-python` module which is now
+  obsolete. To activate Python bindings the CMake flag
+  `DUNE_ENABLE_PYTHONBINDINGS` needs to be turned on (default is off).
+  Furthermore, flags for either shared library or position independent code
+  needs to be used.
+
 ## build-system
 
 - The name mangling for Fortran libraries like BLAS and LAPACK is now done