BlockState for Command Blocks.  Adds BUKKIT-3805.
Readd missed diff for minecart container size. Fixes BUKKIT-3826
Don't filter out -1 data in ItemStack. Fixes BUKKIT-3824
Handle filled buckets dispensing up and down. Fixes BUKKIT-3814
Really don't filter out -1 data in ItemStack.
Update CraftBukkit to Minecraft 1.5.1
Implement unit test for hasGravity(). Adds BUKKIT-3832
Add Fish (Hook) entity to PlayerFishEvent. Adds BUKKIT-1025
Merge remote branch 'upstream/master'