“Go see what the center of the universe looks like,” one character says to another in Ang Lee’s “Taking Woodstock.” And the film is just that, a look into the center of American culture in 1969. But “Taking Woodstock” does not solely focus on the festival itself, as Michael Wadleigh’s documentary “Woodstock” does. Instead, more attention is given to the lead-up to the festival and the true story of the family who brought it to Bethel, N.Y.