Create official oAuth Accounts for the IUNO Project

[MBeuttler]

When using oAuth with google, facebook or another provider, you always have to register as a developer first.

Then each developer can setup an oAuth application providing a ID and SECRET for each provider.

Currently we are using the iconia account for twitter and google. But for facebook christian is using his private account.

We should have a central, persistent and "official" account for all providers.

Currently oAuth Credentials are needed for:

Google: https://developers.google.com/identity/protocols/OAuth2
Facebook: https://developers.facebook.com/docs/facebook-login
Twitter: https://dev.twitter.com/web/sign-in

Please setup developer accounts on this plattforms and provide us with client credentials.

You'll have to set 'redirect urls' on all those apps.

This redirect urls should be (for development):
http://localhost:3005/passport/google/callback
http://tdm990101.fritz.box:3005/passport/google/callback
http://localhost:3005/passport/facebook/callback
http://tdm990101.fritz.box:3005/passport/facebook/callback
http://localhost:3005/passport/twitter/callback
http://tdm990101.fritz.box:3005/passport/twitter/callback

The redirect urls for production are not clear yet, but can be set to a later point.