pub deps/get and missing getter in web/areas.dart

I enjoy your blog and game programming patterns book and hoped to contribute to hauberk as a hobby/learning experience.

I don't have any experience with Dart so I figured i'd use the Dart Editor to help with the learning curve. When I forked, cloned, and opened the project folder with the editor I got a bunch of warnings about undefined key codes for numpad keys in Malison. I looked at the Malison repo and saw that they had been implemented so I ran pub deps and was able to resolve all the warnings.

I also saw 2 hints about a missing getter (pictured) so I looked into it and I think it should be content.breeds instead of areas.breeds?
![screen shot 2014-08-09 at 2 15 21 pm](https://cloud.githubusercontent.com/assets/2857078/3868180/4cf2a6d6-2029-11e4-83cd-3239a1364846.png)

I don't know if this is even a helpful thing to merge so let me know what you think. I was just hoping to get started with something small.