Reverts changes to DashboardController in 443daecdcb34543e410695ecfe402790795620ff.

- Fixes a failing testin DashboardControllerTest
- Adds the user back to template data
- The user that was removed was a reference to the user mapper converted to an array
Adds method to session mock to get tests passing again.
Modifies form action that is specified when submit talk validation fails.
Adds raw filter to talk title in review and talks admin interfaces.
Merge pull request #147 from mdwheele/iss145-talk-title-escaping

Adds raw filter to talk title in review and talks admin interfaces.
Merge pull request #146 from mdwheele/bugfix-submit-talk-failed-validation-formaction

Form action on failed validation of talk submission improperly set
Merge pull request #142 from mdwheele/bugfix-reverts-user-global-changes

Bugfix reverts user global changes
Fixes SwiftMailer exception reported by TravisCI

- Adds config to application container.
- Extracts SwiftMailer reference into application container at key, 'mailer'.
- Updates to TalkControllerTest to mock call to mailer send method.
Refactors to ForgotController to resolve mailer from container.