Fix #904, Required regenerate and save API (req.session.regenerate is not a function since upgrade to 0.6.0)

[joeyguerra]

Background RE: #904

Using [email protected], [email protected] with the [email protected] module to login with Github, the application throws the following error message:

TypeError: req.session.regenerate is not a function at SessionManager.logIn

Feature

Utilize the Delegate Pattern and default to an empty implementation so that the code does not throw an error.

Checklist

• [ x ] I have read the CONTRIBUTING guidelines.
• [ x ] I have added test cases which verify the correct operation of this feature or patch.
• [ x ] I have added documentation pertaining to this feature or patch.
• [ x ] The automated test suite ($ make test) executes successfully.
• [ x ] The automated code linting ($ make lint) executes successfully. (NOTE: Lint errors are with code not touched by this PR)

[maicongodinho]

Is there a possibility of this being merged in the near future? @jaredhanson