Productive Websites Addition

(God, I've emailed then commented and only now found the pull requests area, sorry!)

I've added a productive websites input that gives positive EXP & Gold. 
I've also added cookies which check if the user has been on a website (good or bad) in the last 30mins in order to only deduct points on the first visit + every 5mins. (Before it would be on every page load, e.g. clicking on comments)

Tested and working as far as I can tell.