Minor spelling issue

save  > safe
Merge pull request #15 from sam-m888/patch-1

Minor spelling issue
Merge branch 'dev'
DOC: Added release note
Add tox support

- Add a tox ini file
- Add tox.ini to Manifest.in
- Describe tox in docs
- Allow passing arguments to py.test by tox -- py-test-args
- Various additions and configurations to tox.ini
- Add a lot of useful python versions as default envs
- Add skip_missing_interpreters=True as a useful default
- Add two environments for pyflakes and pep8 tests
- Add changedir directives for tests
- Add pytest dependencies
- Improve documentation
rename tox.ini.template to tox_ini.template
Fix typo in tox.ini template docstring