Store instructors in a YAML file.

I'm open to opinions on this, so feel free to speak up.

I started working on updating the instructor information and I found that having it stored in the Wiki as well as the website was rather redundant so I thought that it would be ideal to just store it directly in the site only.

The other part of this is trying to make it somewhat easier to manage the instructors. Thoughts are welcome on better solutions. I didn't put any new entries in until I garned more opinions.