Rearing Ponicorn repaired

I really wanted to print the Rearing Ponicorn from bs3, but the model is nearly impossible to print:
* There is a space under the feet and under the tail
* The model needs supports
* Even with supports, the model tends to break the supports under the wings

So I fixed the space by shifting the model down and by adding carefully designed supports with Meshmixer.

Please use the lowest possible temperature that you can reasonably use with your filament and use small layers