Minecraft Snapshot 12w38a

Mojang has released a brand new snapshot this week, bringing a bunch of new features and fixes for the upcoming 1.4 release.

- Updated and added new sounds by C418
- Added a neutral mob
- Added a hostile mob (doesn’t spawn yet)
- Command block target parameters have been upgraded, check here for details: https://gist.github.com/3736487
- Beacon artwork has changed