Add README with screenshots

README.md

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+# Hexsphere Generator
+
+Eventually, this will be a full-blown planet generator. But, for now, this is a 
+hexsphere generator. This shape is also known as a [Goldberg 
+polyhedron](https://en.wikipedia.org/wiki/Goldberg_polyhedron) or a [truncated 
+icosahedron](https://en.wikipedia.org/wiki/Truncated_icosahedron). It is made 
+from generating a [icosahedron](https://en.wikipedia.org/wiki/Icosahedron) which 
+is split N times for a detail level of N. The [dual 
+polyhedron](https://en.wikipedia.org/wiki/Dual_polyhedron) of that shape is 
+calculated which results in the hexsphere. In its smallest form (detail level of 
+0), it has 12 pentagon faces. As the detail level increases, it gains more 
+hexagon faces and becomes more spherical in shape.
+
+Detail level 0:
+
+![detail 0](img/detail-0.png)
+
+Detail level 8:
+
+![detail 8](img/detail-8.png)