Fixed the SNR value which is in 0.1 dB resolution
Convert the signal quality in linuxdvb to percentages
linuxdvb: use the v5 property interface for statistics
linuxdvb: fix small errors while gathering statistics
linuxdvb: another small typo
linuxdvb: convert snr units to dB
imagecache: fix stupid compilation mistakes in code rework.

Fixes #1848
linuxdvb: fix backwards compatibility
Merge remote-tracking branch 'origin/pr/307'
linuxdvb: API compat fixes for stats update from PR307