Added mail system

Sorry I wasn't able to get a chance to test this, but it SHOULD work. I don't have a MySQL database set up for this. If you add it to the server, let me know how it goes (I didn't realize you had put up a beta app, so I'm not on the server) ;) Also, the details for the MySQL table required for the mail system is in the commit for it. Finally, the reason I chose to have a cleared column rather than just delete it is because then if there's an issue (like someone trying to report someone else), then you can recall it later.

I hope I did this pull the right way, I'm bad at pulls.