Added Martin Cavoj to the contributors list

README.rst

@@ -137,4 +137,5 @@ Maintainers/contributors:
 
 * Miroslav Shubernetskiy - `GitHub <https://github.com/miki725>`_.
 * Arien Tolner - `GitHub <https://github.com/Bounder>`_.
+* Martin Cavoj - `GitHub <https://github.com/macav>`_.