Revert "Add new property animationDirection to determine if the animation plays forward or back."

This reverts commit 95b0174ffe3a53ed8ad283ba75265b51821bdccf.
Fix bug linking the animationRate to the threejs driver.
Deprecate fps property, and add new read-only property animationFPS that only comes from the collada model.
Add new animationFrameCount and animationFrame properties.

Refs #2801