New reward slots

I've shuffled around the reward slots on here, meaning that you can opt to receive a special, Patreon-Only edition of each new game if you contribute $10 or more per release.

I've also added a few more printed edition slots to the scheme, although these are a bit more expensive - printing 'em off and sending them internationally costs a fair bit.

Also I note that no-one's selected the $6,000 option, what's wrong guys

- G