sending template pdf with certificate request
fixing some typos
Fix bug in grabbing course enrollments.

LMS-1475
If student has not passed verification, issue an honor code cert.

Also, display a message on their dashboard.
Use class methods to find the enrollment mode.
Pass through the certificate mode correctly.
Use Choices to track possible modes.
Fix typo in comment.
Merge pull request #1604 from edx/jarv/verified-certs

Jarv/verified certs