Minor spelling issue

save  > safe
DOC: Added release note
Added Holger Peters as author
ENH: Removed unused import from setup.py
ENH: Added flake8 args to omit certain files
ENH: Added flag for Tox configuration file
DOC: Added some comments to tox.ini
FIX: During update write files that did not exist before
FIX: Python 3 iteritems fix