Graphene logos for option 2

This pull request contains the draft digital rendering of the [Option 2 analog version](https://github.com/graphitefriction/arquillian-artwork/commit/39e9cd3c18b932bfe6ed35b421de87ab51b606f8) aka the Perspective Structure.

### The logo has been rendered in 5 material types.

Basic materials, with no added textures and minimal lighting and shading:

* Silver smooth
* Black smooth

Materials with texture maps:

The textures on these examples can be increased or decreased, made to look as if they sink into the sphere or rise from the sphere.

* Silver with smooth swirls
* Pitted Silver
* Black with rough grooves

### Proportions and Perspective

Like in the analog draft, the molecule is shot from straight on, but slightly above so the bonds and molecules in the back can be seen.

However, I can position the camera to shoot from any position around the molecule and even adjust focal length and depth of field.

The  Pitted Silver Angle PNG image below was taken from the side at increased height.

Thicker bonds? Shorter bonds?

Next, I will be working on the digital logo draft of Graphene in the grid.