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Dynamic Mixins/Services for Nessie

This sounded like a good idea initially, but now it's not working so well. Since avatars do the communicating now, services would have to be added to both the avatars and the peers. Yuck. So, that means that either 1) avatars and peers need to merge and become one, or that 2) the services concept is refactored into something else. Right now, I'm thinking option 2. However, I'm not sure how that refactoring is going to go right now. Unfortunately, it's holding me up on getting the rest of the networking tests to pass :(
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