rdkit/rdkit: 2019_03_3 (Q1 2019) Release

Release_2019.03.3 (Changes relative to Release_2019.03.2) Acknowledgements: David Cosgrove, Gareth Jones, Brian Kelley, Karl Leswing, Vincent Scalfani, Riccardo Vianello Bug Fixes: Chem.MolStandardize.standardize.Standardizer drops molecular properties (github #2431 from lilleswing) Fix/rgroup sdf isotope (github #2449 from bp-kelley) Uncharger incorrectly removing charge from boron anions (github #2452 from greglandrum) Add java builds to azure devops (github #2460 from greglandrum) Cart fixes (github #2462 from jones-gareth) Negative atom map values cause depickling to fail (github #2465 from greglandrum) Deserialization failures crash Java wrapper (github #2466 from greglandrum) rdkit.six fix and cleanup (github #2469 from rvianello) dummy atom queries are flagged as complex (github #2471 from greglandrum) 3D structure display broken in jupyter notebook (github #2473 from greglandrum) Inconsistent defaults for nonBondedThresh in MMFF optimization (github #2475 from greglandrum) Fix/rgroup multiple labels (github #2481 from bp-kelley) 2D Depiction clipped atom highlighting (github #2486 from DavidACosgrove) BRICSBuild now passes scrambleReagents to children (github #2488 from greglandrum) fixed the dead Conda installation document link (github #2495 from vfscalfani) Pattern Fingerprint Issues (github #2501 from jones-gareth