Rounding out the curved tiles

Today we are rounding out the full cut-stone set of curved tiles (pun totally intended).

We've added:

As a part of this release, we are also making the Thingiverse organization a bit more tidy.  You can find the other curved releases here:

We're going through all the other OpenLOCK tiles to get them into this basic organization of three styles (Rectangular, Curved, Angled) with six forms (Floor, Riser, Full-Height Riser, Wall, Half-Height Wall, Flat-End).