SAN JOSE- It’s a time for cautious optimism. This is merely a good start, nothing more, nothing less. The San Jose Sharks have come out of the gate finding ways to win each game, but, there is no reason to get overly excited. This is simply a positive early trend. The Sharks rode a three-goal second period on opening night, Sunday in Calgary, to earn a 4-1 win. They tallied six times in the first stanza two nights later in Edmonton to spoil the Oilers party, 6-3. Two nights ago, they pulled another rabbit out of the hat, scoring four …