Introductory animation

We're re-architecting how we handle concepts around asset ownership, splitting up our current object, the Tract, into a new object with multiple sub-objects, to more accurately match user's realities.

While the concept is reasonably intuitive to folks, and we're making moves to match their world, the change was still a drastic difference to a highly trafficked feature set—this introductory animation + screen is meant to help folks understand what's going on, to smooth over the move, and reduce support requirements.

Trying to stay lower fidelity for longer, it's definitely letting me ask more general experience questions, and letting me move a little faster.

Re-uploaded from last week because of a bad start frame on the gif. Can't wait for mp4 uploads...