NB rolling average: 10 point PC lead

Minor changes to the 5-day rolling average:
PC - 48% (+1)
Lib - 38% (-1)
NDP - 9% (=)
Green - 4% (=)
PA - < 1% (=)

This incremental move serves to move the seat projections incrementally:
PC - 37
Lib - 17
NDP - 1