Added the hasGravity method to Blocks. Adds BUKKIT-3832
Add Fish (Hook) entity to PlayerFishEvent. Adds BUKKIT-1025
Add method to get the source of a TNTPrimed.  Adds BUKKIT-3815
Add ability to modify ThrownPotion properties. Adds BUKKIT-3197
Map old wildcard recipe data to new 1.5 value. Fixes BUKKIT-3849