Changelog for HipmunkPlayground-5.2.0

Version 5.1.0 ============= - Updated to Hipmunk 5.1.0. Version 5.0.0 ============= - Updated for Hipmunk 5.0.0. Yay! - Added a small car using @SimpleMotor@ (not the best way of creating a car, but it works as a demo). Version 0.2 =========== - Add a seesaw to the middle of the screen. - Show the line of the pendulum. - Show instructions on the screen. - Add slow motion key. - Add clear screen key. - Add rotation control keys. - Use higher frequency for the Chipmunk engine (360Hz instead of 120Hz). - Draw a small red dot on the body's center. Version 0.1 =========== - Initial public release.