Merge pull request #4 from oanat/compatibility-3.5.1

Updated pom to use a newer version for the socialauth API
The authentication URL should use, when available, the custom permissons set on the configuration file
5: Users that have signed in with their Facebook account cannot sign out
Merge pull request #9 from tmortagne/compatibility-3.5.1

5: Users that have signed in with their Facebook account cannot sign out
Merge pull request #8 from oanat/custom-permissions

Custom permissions for the authentication URL