Get the BlockState before changing the block. Fixes BUKKIT-3441
Fix entities traveling sideways. Addresses BUKKIT-3443

Original: Update mappings to correct 1.4.6 version.
Initialize entity data before spawning them. Fixes BUKKIT-3209

Vanilla does the initialize before spawning everywhere except in the
SpawnerCreature, our spawn event depends on this behavior to be
consistent.
Update CraftBukkit to Minecraft 1.4.7
Updated version to 1.4.7-R0.1 in pom.xml for Beta.
Updated version to 1.4.7-R0.2-SNAPSHOT for development towards next release.
Merge remote-tracking branch 'upstream/master'