Merge pull request #156 from akkie/master

Provide default PartialFunctions to recover from silhouette's exceptions
Fixes #157
Build failed because of dead code in XingProvider
Merge pull request #157 from akkie/profile_builder

Add profile builder implementation
Fixes #161
Spec needs Scala execution context
Merge pull request #161 from akkie/profile_builder

Use Play's execution context instead of the Scala execution context