Changelist
- Better handling of suds Text to Python string type using six.
- Dict keys in returned response are now unicode as well.
- [urllib3 warning handling](https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning) implemented.
- Added coverage installation to Travis CI script.
- Added Python 3.5 to Travis CI testing.
- README updated with details about pyopenssl.
- README updated with information about pybankid-example-app.
- Added classifier troves to setup.py
- Removed OpenSLL stderr output when generating test certificates.