media/publicsenat.lua: Rewrite parse function
Rewrite "parse" function for libquvi 0.9+ series.
* Remove any now obsolete code (e.g. self.host_id)
* Add PublicSenat.iter_streams function
* Update vim modeline
NOTE:
This port takes a shortcut to parse the media stream URL and the
thumbnail URL. They are now parsed from the input URL, rather than a
secondary URL -- put together using a static URL prefix and the media
ID. If that, really, is necessary, we can add the additional steps
later.
Signed-off-by: Toni Gundogdu <legatvs@gmail.com>