Dynamics 2 (imrpovements)

Improvements in Dynamic convert type:
- Consideration of inertia of punctual mass respect to the origin
- Add subparameters to make linear or rotational springs rigid. This disables the corresponding movement.
- Add subparameter to make the resulting vector being dragged or not being dragged by the origin. This would be useful when the vector that is being under dynamic influence is dragged by other vector not connected to the origin subparameter directly.