Added authenication indicator in notifications and form

Resolved #5036, #5046, #5047 tasks in fogbugz.
User will be able to add his own 'Is authenticated' field in the form.
If field is not added to the form, notification message will still
indicate if the form had been authenticated or not.

Also updated the Example config file.
Merge branch 'dev' of github.com:BellevueCollege/gravityforms-external-data-fields into dev

Conflicts:
	gravityforms-external-data-fields/EXAMPLE-gravityforms-external-data-fields-config.php
	gravityforms-external-data-fields/gravityforms-external-data-fields.php
Merge branch 'fb5062-ForceCasLogin' of https://github.com/shawn-bellevuecollege/gravityforms-external-data-fields into shawn-bellevuecollege-fb5062-ForceCasLogin
Merge branch 'dev' of https://github.com/TriptiSharma/bc-forms-plugin into pr13-tripti