CodeIgniter Mailgun Library

Drop in email library to send via the Mailgun API.

I created this as I wanted to start sending via the Mailgun API, but didn't want to change all the CI $this->email->send() instances within my project. This is intended to be saved as application/libraries/MY_Email.php and should allow existing email sending to seamlessly start sending via Mailgun.

This is very much a WIP (Work In Progress), so some things may be missing.