1. Update Custom user model (EmailUser)
2. Integration with Python-Social-Auth.
3. Enabled local development with Facebook/Linkedin authentication.
Please refer to Section 16 of dev doc:
https://docs.google.com/document/d/1rdDzYS-olYogbpo6wfkpq4k9EPbMQmXMXkDV-Rzd0xM/edit#heading=h.5bxaxjpird5t
Merge branch 'master' of https://github.com/jobinrefer/dev