[pvr] sync add-ons with https://github.com/opdenkamp/xbmc-pvr-addons/tree/frodo

for 12.3 if this is allowed by @davilla, since these are fixes but not crash&burn.

* https://github.com/opdenkamp/xbmc-pvr-addons/pull/178
* https://github.com/opdenkamp/xbmc-pvr-addons/pull/191
* https://github.com/opdenkamp/xbmc-pvr-addons/pull/192
* https://github.com/opdenkamp/xbmc-pvr-addons/pull/193