Improve WebCLProxy log

2013-04-24  Alexandre Rocha  <a.rocha@samsung.com>

        Created a wrapper to console API to add some
        capabilities as change log level in runtime.

        Improved WebCLProxy log with time and group
        functions and revisted some log messages.

        Reviewed by NOBODY (OOPS!).

        * webcl/resources/Logger.js: Added.
        * webcl/resources/webcl-proxy.js: