Vnsi4

1) Full timeshift support
- configurable as buffer in RAM or file
- addmin dialog in LiveTV settings - client specific
- pause of live stream
- navigation in buffer, seek, ff/rw

2) Playback of recordings in progress
- If a recording is in progress, simple click the channel just as you would start live playback
- When the recording is finished, it switches to live automatically.

3) Priorities
- Setting of priorities for live view in addon settings dialog (default 0)
- Higher priorities can interrupt lower ones. Default priority for recordings is 50 (LiveTV settings - recordings)
- If you have multiple clients, those with higher priority can interrupt live view of others.

4) VDR UI