media/ardmediathek.lua: Rewrite parse function
Rewrite the `parse' function for the libquvi 0.9+ series.
* Remove now obsolete code (e.g. self.host_id)
* Update vim modeline
ArdMediathek:
* Reimplement `container_from' as `to_container'
* Reimplement `test_availability`as `chk_avail'
* Reimplement `iter_formats' as `iter_streams'
* Reimplement `quality_from' as `to_quality'
* Reimplement `height_from' as `to_resolution'
* Implement `to_encoding'
* Implement `get_title'
* Remove `get_config'
Signed-off-by: Toni Gundogdu <legatvs@gmail.com>