Store next url redirect for in session to work with oauth login callback

[gazpachoking]

With oauth login, it was always redirecting back to the home page, no matter where you got redirected to the login page from. This stores the next argument to the login page in the session, so that it can be read even from the callback view for the oauth provider.

[gazpachoking]

I have a confession. I only tested this with oauth login, I assume it should work the same across all of them though.

[scragg0x]

@gazpachoking See if you can resolve the conflicts and we can merge this.