Add the option to request offline access.
Return Refresh Token after WebView login.
Store refresh token in Auth0User.
Send refresh_token on getDelegationToken call.
Add example to share keychain data btwn apps.

Splitted getUserInfo methods to use either a access_token or a id_token.
Add JWT & refresh tokens in screen.
Moved Examples to 'Examples' folder.
Create README.md
Update README.md
Merge pull request #18 from auth0/feature-refresh-token

Refresh Token + Keychain Sharing sample