Add some demonstrations of the library's capabilities

Each publicly exposed method (whether the general animate method or a specific one like translateX) has a brief code example given in the documentation. It would be good to make these runnable, so as to demonstrate the library in action.

yes, or just some general examples, no examples = sadness

I'm working on this. Suggestions for nice examples or demos are very welcome.

Another vote for this. Maybe a few basic examples, like a bouncing ball and a stress test?