It would be fair to say the new release, “Boxes,” isn’t just another album for the Goo Goo Dolls. And the two years that preceded the album’s release saw big changes, especially for singer/guitarist John Rzeznik.With “Boxes,” Rzeznik and his bandmate, bassist Robby Takac, have become a duo following the departure of long-time drummer Mike Malinin. And they’ve arguably introduced more new musical elements on “Boxes” than on any Goo Goo Dolls album since 1995’s “A Boy Named Goo.”That album gave the group its first major hit single, “Name,” and signaled a shift away from the scrappy punk sound of