Update the examples in the gst-launch-1.0 manpage
Update the examples in the gst-launch-1.0 manpage

Replace elements that don't exist any more with ones
that do, and insert elements like mpegaudioparse where
they are needed.

https://bugzilla.gnome.org/show_bug.cgi?id=727105

StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer