Enable Python and codegen by default
Enable WALBERLA_BUILD_WITH_PYTHON
/WALBERLA_BUILD_WITH_CODEGEN
by default if Python/lbmpy are found, respectively
Follow-up to !352 (merged)
Enable WALBERLA_BUILD_WITH_PYTHON
/WALBERLA_BUILD_WITH_CODEGEN
by default if Python/lbmpy are found, respectively
Follow-up to !352 (merged)