Added most 1.5 items, enabled selling potions, change how data values are handled.

Added 1.5 items, but only made Nether Quartz active:1
Added new potions, set all potions to active:1
Moved plugin.yml back to resources so that it gets built to the root of the jar.
Fixed stackKey and splitStack to accommodate potion receipt and sales, and in general to get data values more reliably (need to use durability rather than material data, need to hard truncate it when getting material data by way of the durability)