Add a rigging system for 2D animation (Bones, IK, joints, etc.)

[Gracedasnek]

If this idea is not already in development, i would like to request adding a rigging system. Basically, similar to Adobe Aftereffects, and the pivot point feature. Rigging is where you add “bones” and “joints”, then move those bones/joints however you please, to animate. It could be part of the animation toolbar things, since this will mainly be needed for animation, or it can be a seperate thing- maybe a simplified IK system for 2D animation. An example of this being used is for arms. Arms have around 3 joints in a simple animation, and tweening them with simply pivot points is a bit difficult. So i believe that adding this would be beneficial to MANY animators; because tweening is a common practice for many who use this app. Any feedback on this feature is allowed!