Movies need to get quite a bit of information across to the viewer in their very short opening scenes, and The Great Gilly Hopkins did not disappoint; Gilly showed her tough-as-nails attitude and made me love her completely within a few seconds; what's not to love about a sassy tween?? Says the naive mother of a sassy threenager... Adapted from the award-winning, 1978 novel by Katherine Paterson, it's not a "new" story--angry tween bounced from foster home to foster home, finds family at …