First send stream-start, then caps, then segment.
The segment we push is from upstream in push-mode. If we work in pull-mode
then we initialize the base segment to BYTES.
https://bugzilla.gnome.org/show_bug.cgi?id=702422
tspad always has a static source pad which output everything received
(not functional yet).
Program pads are now request pads.
Remove all cruft that should have been removed from the switch over
to mpegtsbase.
Conflicts:
gst/mpegtsdemux/mpegtsparse.c
