They built a new digital voting system, but the voters didn’t come. There was some disagreement Wednesday over why only 6.3 percent of eligible voters used a new, first-in-the-U.S. digital voting procedure to cast ballots for Honolulu neighborhood board seats via the Internet or by touch-tone phone. Still, officials at both the Neighborhood Commission, which oversees the neighborhood board elections, and the San Diego, Calif.-based company that created the voting system, insist that digital voting is probably the wave of the future.