Added reindeer hats

New reindeer hat for humans and corgis. Light is toggled on and off like hardhats, is not very bright.
![reindeer](https://f.cloud.github.com/assets/4343468/1721461/3e06a650-6223-11e3-9da0-106254a725c4.png)
Also moved pumpkin hat to be a child of hardhats as it used copypasted code from them.
Changed the santa hat on corgi to remove sprite and reference to red nose.