License CC-BY-NC-SA-3

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you can use this work if 
you attribute it: By Rafael Fajardo
you use it for Non Commercial purposes
your resultant work is Shared Alike

<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-sa/3.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" property="dct:title">ZombiesOMG</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="https://github.com/rafaelfajardo/ZombiesOMG" property="cc:attributionName" rel="cc:attributionURL">Rafael Fajardo</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US">Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License</a>.<br />Based on a work at <a xmlns:dct="http://purl.org/dc/terms/" href="https://github.com/rafaelfajardo/ZombiesOMG" rel="dct:source">https://github.com/rafaelfajardo/ZombiesOMG</a>.