Potions Plus RS

This project adds a couple of new potions into minecraft for you to try out.

Here are the potion recipes (all splash and lingering variants are brewed normally):
- Potion of Flying = Potion of Slow Falling + Firework Rocket
- Potion of Burning = Potion of Fire Resistance + Blaze Rod
- Potion of Armor Decay (I) = Potion of Weakness + Iron Ingot
- Potion of Armor Decay (II) = Potion of Armor Decay + Glowstone Dust
- Potion of Feather Foot = Potion of Leaping + Feather
- Potion of Reach = Mundane Potion + Stick

Tipped arrows are crafted normally