Bump version number to 1.7.2
Adjust POST_LOGIN_VIEW and POST_LOGOUT_VIEW test
Make `validate_redirect_url` smarter. Fixes #261.
Fix tests to pass python 3
Improve encoding of strings. Addresses #231 and #253
Use `safe_str_cmp` when evaluating tokens. Fixes #252
Do not expose user info in `/reset` responses. Fixes #249
Add python3.4 to travis and tox
Update CHANGES
Merge branch 'develop'
Bump version number to 1.7.3