GCAAuth: SecureSocial based trait to handle our auth needs

Currently has a AccountAwareAction that gives an Account (as
compared to an Identity in the original UserAwareAction)
GCAAuth: Add AccountAwareAction and AuthenticatedAction
Demo new Actions in Application controller
controller.Abstracts: Implement get() method
FigureService: replace file.toPath with .toString in exception

This removes the dependency on Java 1.7
Merge pull request #41 from gicmo/authAction

Add custom Actions that are account aware or require an Account