Add contributors list

CONTRIBUTORS.md

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+# Contributors
+
+Cylon.js exists thanks to the efforts of these hardworking humans:
+
+- Andrew Stewart ([@stewart](https://github.com/stewart))
+- Edgar Silva ([@edgarSilva](https://github.com/edgarSilva))
+- Gize Bonilla ([@XixeBombilla](https://github.com/XixeBombilla))
+- Mario "Kuroir" Ricalde ([@MarioRicalde](https://github.com/MarioRicalde))
+- Ron Evans ([@deadprogram](https://github.com/deadprogram))
+
+Thank you!
+
+Please join us, we'd love your contribution too.