Fix email address comparison issue

When comparing the From address of incoming email. If the ticket owner sent
an email back into the system and the email address did not match exactly,
case-wise, the email would not be considered from the ticket owner.
Last mile for test failures

Add stubs.php to include stub classes for built-in PHP classes used
throughout the code. This will allow the testing suite to verify that a
method exists, albeit not in our codebase
Allow for CC support