Added Sault College of Applied Arts & Technology

I wanted this change to be restricted to the @student.saultcollege.ca subdomain.

I am a student here and had to submit many requests to Github to get them to approve my application for the student plan. I figured I could help contribute to the project and maybe save some students in the future some time.

Sault College is based in Sault Ste Marie, Ontario and their website is available at http://saultcollege.ca/.

Thanks!