For this year’s avidly anticipated Spring Dances, L.A. Dance Project presents the world premiere of Janie Taylor’s “Sleepwalker’s Encyclopedia” and the Los Angeles premiere of Benjamin Millepied’s “Me.You.We.They,” a collaboration with the composer Nico Mulhy. Alternating on the bill are two earlier Millepied-Muhly pieces: “Moving Parts” (2012), and “Triade,” a 2008 tribute to Jerome Robbins.