Unit testing

Finally got AsUnit to work with MTASC. There is basically zero documentation on the web for this; I should probably write something up sometime. Goes on the bottom of my TODO list, after I get everything done for Diffle.

I rigged it up so we have a Python script that builds the game archetype, then links that against AsUnit and our unit tests and runs all the unit tests through the standalone flash player. It's pretty convenient - I would've preferred a completely command-line solution that automatically checks all output and doesn't require a GUI, but this is still a single command.

It found 7 (!) bugs, just in the ActionScript skeleton we've got so far. Most were silly typoes, forgetting an element of an object hierarchy or passing in an object when we meant a string ID. But without some sort of testing, we'd never have been able to track them down. Flash is notoriously debugger-unfriendly, particularly on Linux without the Flash IDE.