Copy the license portion of readme.md into license.md.
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+The Source Code Form of MathQuill is subject to the terms of the Mozilla Public License, v. 2.0: http://mozilla.org/MPL/2.0/
+
+The quick-and-dirty is you can do whatever if modifications to MathQuill are in public GitHub forks. (Other ways to publicize modifications are also fine, as are private use modifications. See also: MPL 2.0 FAQ).
