Fix/smooth animation

[maddyb99]

Original Animation (Bounce Out):

Here, as you can see, the bounce comes in with a delay, which seems a bit jittery or off.

Decelerate

Here, it pops out, but does not bounce, so it seems smoother than before. I have also reduced the duration of the animation to reduce the apparent time delay between actual drag start and the drag behaviour of the animation.

FastOutSlowIn:

This is also similar to Decelerate but a bit less like it. Personally, I would prefer decelerate over this any day, but its upto you to choose. I looked up the actual design and found out that Decelerate would come closest to it.

closes: #16