BVF: Pass through colorimetry information

This enables the usage of colorimetry information passed down the
filter chain from the decoder.

Currently limited to a white list of filters:
 - VMR7,9
 - EVR
 - madVR
ISR/VSFilter: Use correct colorimetry information for PGS and DVB subtitles.
DVB: Don't update stats when channel is not active.
DVB: Show current event time in the status bar
DVB: Make use out of the DVBState struct.
Mpeg2SectionData: Minor refactioring of the ParseEIT() method
DVB: Cosmetic for SetChannel()
Cosmetics for timers.
Cosmetics for stats.
DVB: Fix time calculations

StartTime was day off in certain cases.
DVB: Add channel name to snapshot filename
DVB: Add only supported services.