Delay the JSMpeg.CreateVideoElements call 'till after the script has loaded

[skerit]

I couldn't find an issue about it, so I guess nobody has come across this issue yet.

When you load JSMpeg on-the-fly, it performs a JSMpeg.CreateVideoElements(); call because document.readyState === 'complete'

That's nice and all, but it does that before all the other code has run, so JSMpeg.Player and all is still null.

Wrapping it in a simple setTimeout fixes that.