Create README.md

- added short ReadMe file: fixes #29

README.md

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+# How to Maintain
+
+For detailed information on how to maintain the CBA Setting Lock mod please check the <a rel="wiki" href="https://github.com/CntoDev/cba-settings-lock/wiki/Updating-settings-on-modset-update">wiki</a>.
+
+
+# Copyright License
+
+<a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.