Added some animations and a cat

I kept tweaking things because I'm like that. This update includes a couple more variant parts for the slush and slurp machines, so you can do different combinations with the machine, the cups, and the trash bin counters. I also added a cat to hang out on top of the cold cases, and two additional door frame options so it can slide open and closed. I'm most proud of those, though I don't have a proper animation example of it yet.