Add link to CONTRIBUTING.md in README
Add missing new line to README.md
Remove point about squashing commits.
Add an enum for Nether Wart growth stages. Adds BUKKIT-1599
BlockState for Command Blocks. Adds BUKKIT-3805.
Pulling all pending Bukkit-JavaDoc changes
Update Bukkit for Minecraft 1.5.1
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
Add Dropper BlockState.  Adds BUKKIT-3750
Add InventoryMoveItemEvent. Adds BUKKIT-3765

This event is being called whenever a block or entity (e.g. hopper) tries to
move an item from one inventory to another inventory (one inventory may be
the hopper itself).
Add Thorns to DamageCause - Related to BUKKIT-3505
Add ability to change player item in hand. Adds BUKKIT-3318
Add methods to check for conflicting enchantments. Adds BUKKIT-3830
Allow fishing success rate to be adjustable. Adds BUKKIT-3837
Pulling all pending Bukkit-JavaDoc changes
Add Beacon BlockState for hopper events. Fixes BUKKIT-3932