added extended profile sample
added a sample to retrieve the extended attributes from a profile
retrieves the attribute links directly from the rpofile document
uses the service endpoit to retrieve atttributes one by one
added extended profile service operation
added a method on the service to fetch the extended attributes
added warapper on the profile to call the service method
added a sample to show the extended attributes from a profile
Merge pull request #1315 from LorenzoBoccaccia/extended-profile

[added] extended profile attributes samples