lars.krantz@alaz.se

Hello!
I suddenly started to get "/lib/huey/bulb.rb:56:in `save': uninitialized constant Huey::Bulb::MultiJson (NameError)" in Huey.
Forking and running tests confirmed it:
![Failing tests](https://f.cloud.github.com/assets/482247/1418405/dcd0ab88-3fb3-11e3-8f9e-9b7637b2ef19.png)

The patch is simply an added dependency and require for multi_json.

Thanks for a great gem!
/Lars Krantz