[tvheadend] added working seek support.
[tvheadend] ensure timeshiftStatus does not spam logs
[tvheadend] update subscriptionSeek call to use abs PTS
[tvheadend] correct previous mistaken fix to webroot processing
[tvheadend] update addon version info
[tvheadend] fix return PTS when skipping
Merge pull request #175 from adamsutton/pvr-hts-keep_opdenkamp_happy

webroot fix and updated seek support