added kill awards module

Hey, just submitting this as a pull request to bounce the idea of adding this into the main store repository or if you'd rather keep this as a separate module? It works in a dynamic way so that you can define points given based on the event handle given to player_death.

I'm not sure if it could be abstracted away further to a more generic "tasks" system because of the teamkill and suicide stuff (though you might have a better idea on that)

-eXemplar