Adds the Assassin origin to the Origins mod
Assassin:
+ You get a dagger that has no attack delay and turns you invisible, but disappears after 12 seconds
+ You get a helmet called the Assassin's Shroud, which will turn you invisible, and gives you a speed boost, but it will go away after 30 seconds
+ You can dash forwards, but only if you are holding the Assassin's Dagger
- You only have 7 hearts
- You lose hunger faster
- You can't hold a shield
