The Master table currently contains four fields (firstNHL, lastNHL,
firstWHA, lastWHA) that give the years a player was active in the NHL
and WHA. I'm considering replacing these with one pair of fields to
indicate the span of years for which a player has data in the Scoring
and Goalies tables. In addition to combining the NHL and WHA years,
this would also include the three older leagues (NHA, PCHA, WCHL).

I don't see this as a major change, but I thought I'd mention this
before going ahead. If this will cause a serious inconvenience for
anyone, I could be persuaded to leave it alone.

Doug