Get supported rates working for webkitwebsrc.  Modified Media player to ask for "supported-rates" property rather than "supported_rates" (make property names consistent).  Got rid of extra line feeds in log messages.  Added a supported-rates property to webkitwebsrc which will call dlnasrc to get supported rates.  Got rid of lock release prior to setting dlna URI since URI needs to be set in dlnasrc prior to allowing startup including querying for supported rates.  Added a call to set dlnasrc uri from webKitWebSrcSetUri()