Merriweather Post Pavilion (2 Lp's)With's 2009's MERRIWEATHER POST PAVILION, Animal Collective fully completes its transition from a restless freak folk act to an assured though still experimental electro pop ensemble. Like its predecessor, STRAWBERRY JAM, MERRIWEATHER takes plenty of cues from PERSON PITCH, the acclaimed 2007 solo outing by singer multi instrumentalist Panda Bear (Noah Lennox), creating a mesmerizing, kaleidoscopic keyboard heavy sound that might pass for pop in an