Ace’s long-running Songwriters and Producers series has recently yielded two stellar entries celebrating two gentlemen equally versed in both crafts: Gary Usher and Bob Crewe.  Part One of our Ace Round-Up today looks at Happy in Hollywood: The Productions of Gary Usher. Gary Usher (1938-1992) would have gone down in pop history as one of his neighborhood pal Brian Wilson’s earliest collaborators, penning lyrics for both a popular hot rod tune (“409”) and one of Wilson’s most introspective, personal statements (“In My Room”).  But he was arguably even more influential as one…