updated changlog
Merge branch 'master' of github.com:saga-project/saga-python
reverse incorrect merge
resort setup imports
updated RU requirements
Merge branch 'master' of github.com-oleweidner:saga-project/saga-python
improve cleanup of shell adaptor tmp files

This might improve performance on MacOS specifically.
Merge branch 'master' of github.com:saga-project/saga-python
Merge branch 'master' into devel