Some opencv testing code

I made a little module to have a more controlled and programmatic testing of tracking algorithms and stuff.

I could use real world data, like a video recording, but I’d like to start here. I think this is smart. I also could have used a more complicated 3d imaging package. vpython makes sense, since it is easy, but getting programmatic access to the images in unsupported somehow as far as I can tell. Now, there is no way something that might work here will necessarily transfer over to real video even after I add noise and point mismatch, but it should simplify some things. I’ve been having more trouble than makes sense to me getting good rotations off of a KLT tracker that is clearly doing a pretty bang up job.