remove un-used auth code
Updated some account related URLs.

- Renamed "social" URL pattern into "account"
- Moved URL patterns from allauth to kuma.
- Moved authkeys and other URLs into "users/account" namespace

Conflicts:
	kuma/users/providers/github/urls.py
Merge pull request #2620 from groovecoder/remove-and-move-auth-code

Remove and move auth code