updated changelog
added another tutorial example
merge
fix #56
attempted to fixed shit that Andre broke
merge
merge
merge some more patches from features/type_checking...

...to make unit tests and Ole happy.
snapshot
Merge branch 'devel' of github.com-oleweidner:saga-project/saga-python into devel
fixed bug in SLURM working_directory logic
another fix
add another user_id test
attempt to fix pty staging problem on MacOS
Merge branch 'devel' of github.com:saga-project/saga-python into devel
fix port interpretation for ssh/gsissh URLs
Fixes issue #58
Fixes #52
more work on tutorial