Implements WCLPlatform

Signed-off-by: Ragner Magalhaes <ragner.magalhaes@gmail.com>
2013-04-17  Afonso R. Costa Jr.  <afonso.costa@samsung.com>

        Implement WCLDevice in WebCLProxy.

        Reviewed by NOBODY (OOPS!).

        * webcl/resources/webcl-proxy.js: