Catalan solids

A complete set of the [Catalan solids](https://en.wikipedia.org/wiki/Catalan_solid). Catalan solids are the duals of the Archimedan solids. They're face-transitive, which means that (like the Platonic solids) they can be used to make inherently fair dice. They have the additional constraint that all of the dihedral angles (angles between adjacent faces) are the same.