Use constraints for animation

[tngreene]

#226 brought up the use of constrains. Perhaps this is a good idea

[todirbg]

I may be mistaken on this, but the constrains and IK work for me as they are. The only thing I need to do is keyframe by Visual Loc/Rot. The only issue with those is that sometimes they fool me that the motion is linear when it is not and, as x-plane interpolates only linear, the animation is wrong in sim. That is easily fixed by adding intermediate keyframes to make it linear enough.