Updated merb_datamapper to require merb-core >= 0.9.3
Updated merb_datamapper to require merb-core >= 0.9.3

mattetti/dm-more,bterlson/dm-more,cachafla/dm-more,mattetti/dm-more,merbjedi/dm-more-hacked,bterlson/dm-more,merbjedi/dm-more-hacked