Feature - advanced OrbitControl

[Davor Hrg]

continuation of #11

nice to have for advanced orbit

• isAnimating give info if camera will be moving more (so animation loop can keep running until camera stops)
• auto rotate animation
• animate jumps to location
• bring certain bounding box into view keeping current angle (option to animate jump if jump anim implemented)
• ease-in a bit drift after rotation,pan pointer movement stops (very low prio, if ever )