Handle the newly refactored minecarts.
Remove duplicate place logic for snow. Fixes BUKKIT-3756
Always consume bonemeal when used on a sapling. Fixes BUKKIT-3755

In Minecraft 1.5 saplings do not grow with a single use of bonemeal anymore.
Our code assumes they will and only takes away bonemeal from the player
when the tree grows successfully (not cancelled by a plugin). Instead we
now always remove a bonemeal even if a plugin is the reason a tree didn't
grow as this matches the vanilla logic more closely.
Limit mob names to 64 chars to avoid client crash. Fixes BUKKIT-3753
Don't set health directly, will interfere with scoreboard system.
Use Chest block state for trapped chests. Fixes BUKKIT-3762
Ignore invalid inventory slots. Fixes BUKKIT-3737