Update README.md

rm-code · rm-code · commit 576297a5c746 · 2016-01-12T03:23:13.000+01:00
Added example screenshot.
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 A force directed graph algorithm written in Lua.
 
+![example](https://cloud.githubusercontent.com/assets/11627131/12252902/a5190d90-b8db-11e5-9199-a9fdb61416ac.png)
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 ## Introduction
 
 _Graphoon_ emerged from the graph calculation code used in both [LoGiVi](https://github.com/rm-code/logivi) and [LoFiVi](https://github.com/rm-code/lofivi).
