[pvr.wmc] 0.3.97 and 0.3.98 and 0.3.99

pvr.wmc Release 0.3.97
- support receiving notifications from the backend
- add notification for new backend version available
- version numbering changed to 0.3.X for XBMC 14 "Helix"
- send client time to backend and add notification for clock drift warning
- provide client name and OS to backend on more non windows platforms

pvr.wmc Release 0.3.98
- add wake on lan functionality
- support PlayCount/WatchedStatus of recordings being handled in the backend

pvr.wmc Release 0.3.99
- manually trigger recordings refresh after XBMC calls SetPlayedCount