Future improvements

Though we've successfully made a chat server, there are a lot of places for potential improvement from both a usability and scalability standpoint. We talked about a number of potential scalability issues in several sections above. "An aside on the foreign key decision", "A future problem with auto-incrementing IDs", "Polling", and "Some expected bottlenecks". However, there are still a lot of usability improvements one could make, some of which would involve different scalibility concerns.