add support for show all tuners in use in the infobar
add support for show the currently date in the infobar
now all skins have to define some new widgets in skin.. look in skin.xml and
search for "not used in this skin yet"
about current used transponder/frontend (frontend state, frontend type, lock
state, sync state, frequency, symbolrate, fec_innter...)
when it is called with True as param it returns the original transponder data
(written to tuner) otherwise it reads the current data out of the frontend
(corrected tuner data)