[uievents] Update refs to uievents-key and -code (#60)

Currently, the spec refers to the old names for the key and code specs:

    [DOM3 code Values] DOM Level 3 KeyboardEvent code Values,
    G. Kacmarcik, T. Leithead, Editors.
    World Wide Web Consortium, April 2014.
    This version of the DOM Level 3 KeyboardEvent code Values is http://www.w3.org/TR/DOM-Level-3-Events-code/.

and 

    [DOM3 key Values] DOM Level 3 KeyboardEvent key Values,
    G. Kacmarcik, T. Leithead, Editors.
    World Wide Web Consortium, April 2014.
    This version of the DOM Level 3 KeyboardEvent key Values is http://www.w3.org/TR/DOM-Level-3-Events-key/.

The should be updated to refer to uievents-key and uievents-code once they are published with the new names. 

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/uievents/issues/60