Another release: more networking UI tweaks, more AI work :)

A pattern is starting to emerge!

• Added a sound when someone joins your online lobby (so that you realize someone joined!).

• Added a count of "lurkers" in the Online main menu so that you can tell if other people are around, and just haven't created a lobby yet.

• Several performance improvements to the AI. It evaluates approximately 34% more nodes-per-second than it did a week ago.

• Set the AI's "display name" in-game to be the level of the AI (before they all just said "Computer" which made screenshots less interesting/informative).

Thanks to everyone for the continued feedback, especially regarding the AI! We've been making long lists of issues to look into, but it's definitely starting to shape up. A few really great Hive players have taken the time to pound on the AI also, and since it's occasionally getting a Draw against Hive Masters, I think we're starting to get fairly close to where we want to be.

Must... keep.. iterating! :)