Added code for unit vector flows conjectures

Author: gexahedron

unit_vector_flows/README.md

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+#[Unit vector flows](http://www.openproblemgarden.org/op/unit_vector_flows)
+
+##Main result her (as of May 18 2016)
+There is a configuration of 30 points on the sphere, which don't have a nowhere-zero 4-flow (but they still have a nowhere-zero 5-flow). Actually, these 30 points are the vertices of [icosidodecahedron](https://en.wikipedia.org/wiki/Icosidodecahedron) and triplets of points are connected as a Petersen graph.