the Bucket o' Blood update (feat. cherries)

![cherry](https://cloud.githubusercontent.com/assets/7573912/4873164/518e0362-6204-11e4-942e-b64925ebfd72.png)

* You can now wear grown cherries on your ears.
* You can now wear a bucket on your head.
* If there were any reagents inside the bucket, they'll spill on yourself, the floor, and any items on your tile.
* Splashing someone with blood will now actually make them all bloody (of course if the blood comes from a human being, DNA is preserved.)
* Showers now also clean blood at every tick.