Updated packages and code to python3. Won't work with python 2
- [DH] requests_oauthlib/__init__.py
- [DH] requests_oauthlib/compliance_fixes/__init__.py
- [DH] requests_oauthlib/compliance_fixes/douban.py
- [DH] requests_oauthlib/compliance_fixes/facebook.py
- [DH] requests_oauthlib/compliance_fixes/linkedin.py
- [DH] requests_oauthlib/compliance_fixes/weibo.py
- [DH] requests_oauthlib/oauth1_auth.py
- [DH] requests_oauthlib/oauth1_session.py
- [DH] requests_oauthlib/oauth2_auth.py
- [DH] requests_oauthlib/oauth2_session.py