adding authentication documentation
Update authentication.md
authentication configuration and Module event handling
starting GitHub-based authentication
almost complete github oauth authentication
provide the ability to log out
login/logout links + user name

- Display a login or logout link, depending on whether the user has identity.
- Display the user's name with a dead link (that will someday go somewhere)
stubbing out registration
Merge branch 'master' into authentication

Conflicts:
	config/autoload/system.local.php.dist
properly handling oauth authentication plugins
Merge branch 'master' into authentication

Conflicts:
	module/Martha/view/layout/layout.phtml
	public/css/martha.css
Merge pull request #35 from mrkrstphr/authentication

Authentication