v0.23.3 fix Android

The Android version had been pretty messed up for a while, and lately hadn't been starting any games. I've fixed it.

Changes to the other versions are pretty minimal. Refactoring, mostly. The one difference that might be surprising is that the "time" property of the engine object now gives you a 3-tuple of the current time, rather than a thing that's kind of tuple-like, but not hashable or constant. The new tuple is special enough that you can connect listener functions like before, but I've made it as much like a regular tuple as I can, otherwise.