Dodekaeder

A [Dodecahedron](http://en.wikipedia.org/wiki/Dodecahedron) is one of the [Platonic Solids](http://en.wikipedia.org/wiki/Platonic_solid).

There is a bug in the Dodecahedron of [Thing 37797](http://www.thingiverse.com/thing:37797), so I created a new one to fix this.