Training Level 07 is done

Finally.  Done.  With training level 07.  I wanted to create a new pendulum object for this one and had a bit of trouble initially getting it to work the way that I wanted to.  After getting a tip from a Box2D guru, I was able to get things working.  The problem had to do with me creating an axle that had no fixture.  When I did this, the pendulum rod quit swinging.  Double plus ungood.  You need to have a fixture in place or the fixtureless body constrains rotation.

So, yeah, WOOT!  Here's a screenshot.