add support for complete rtmp urls (#655)

Now for example following works, without specifying the netConnectionUrl value separately. The src attribute can contain the full netConnectionUrl + stream name. The stream name is the part following the last slash character in the URL, 'ch1' in the example below.

    <video autoplay>
        <source type="application/x-mpegurl" src="http://itv08.digizuite.dk/tv2b/ngrp:ch1_all/playlist.m3u8">
        <source type="video/flash" src="rtmp://itv08.digizuite.dk/tv2b/ch1">
    </video>