New pacing method built for tsplay and made the default. The new method
lacks some bells and whistles that the old method had but spits out packets
closer to the correct time than the old method. Old method is still
availible if needed: -pace-pcr1 should engage it.
tsreport would flag any non-sequential CC numbers as bad, howvever H.222 states
that CC should only increment if the TS packet has a payload.
If we do have identical CCs tsreport now checks that the contents are identical
too.
Fixed some warnings where long long != int64_t
John Cox