Adding a ten boxarts (Mostly games I run)

- Arkista's Ring
- Doki Doki Yuuenchi
- Double Dungeons
- Mario Kart 8
- Octodad: Dadliest Catch
- Robin Hood: Prince of Thieves
- RoboWarrior
- Shovel Knight
- Toki (NES)
- Wiz n Liz: The Frantic Wabbit Wescue
Merge pull request #56 from trysdyn/master

Adding a ten boxarts (Mostly games I run)