2016)cite arxiv:1602.01098Comment: 17 pages, 11 figures, 2 tables. Submitted to ApJ on Feb 1, 2016. Paper presents first results on the evolution of the stellar mass--gas metallicity relation. The description of the survey and dataset is available in Paper I (Ly et al. ApJS, submitted). Key figures are # 4 & 5 (M-Z evolution), 7-9 (M-Z-SFR relation), and 11 (comparison with theory). Comments welcome.