Fraction Blocks 2: Remixed

A decade later, I still get messages from people who find these [useful](https://www.thingiverse.com/thing:154456). I've long since lost the original source code, so I've generated a new set of blocks using some Python and OpenSCAD. The Python source I used to make the blocks is available on GitHub [here](https://github.com/ImproperSubset/fractions).

I've added some fractions to the collection that people have requested over the years. The Python script can generate arbitrary fractions if you're feeling adventurous.

I've changed the labeling so that it is embossed instead of debossed. This should make it easier to change filament color during the print to highlight the labels. Or, if you prefer paint, it should also make it easier to dry brush a color onto the label.