Access Control Allow Origin
For milkcocoa to be used locally it must be served from a http server.
For node.js users we recommend you use a simple npm module http-server to serve your index.html locally.
Or simply use
python -m SimpleHTTPServer 8000 in the terminal at your root directory to run the index.html.
For information on pythons SimpleHTTPServer see
https://docs.python.org/2/library/simplehttpserver.html.