rdkit/rdkit: 2018_03_3 (Q1 2018) Release

Release_2018.03.3 (Changes relative to Release_2018.03.2) Acknowledgements: Thomas Blaschke, Brian Kelley, Josh Meyers, Dan Nealschneider, Noel O'Boyle, Jon Sorenson, Paulo Tosco, 'jaechanglim' Bug Fixes: R-group Decomposition: allow H replacements when matchOnlyAtRgroups is set (github pull #1871 from bp-kelley) Fixes locale handling on Windows (github pull #1892 from ptosco) get the pandas tests working with pandas 0.23 (github pull #1896 from greglandrum) Fix curl fallback for downloading files (github pull #1904 from d-b-w) Bond stereo information not output to SMARTS (github issue #1906 from greglandrum) Library .so names missing RDKit? (github issue #1913 from baoilleach) Negated atom number queries in SMARTS should not set atomic number of query atom (github issue #1920 from greglandrum) memory leak in Get3DDistanceMatrix (github issue #1924 from jaechanglim) Atom with bond to itself is accepted by the SMILES parser. (github issue #1925 from tblaschke) Using the coordgen library seems to cause a seg fault (github issue #1929 from JoshuaMeyers) Aromaticity failure in 7-ring with charged radical carbon (github issue #1936 from bp-kelley) Fix embarassing bug, check the counter each iteration (github pull #1939 from bp-kelley) RuntimeError when importing rdkit.Chem.Descriptors with Python 3.7 (github issue #1948 from drkeoni) Query features in products of rxn files not properly handled (github issue #1950 from greglandrum) ReactionToSmarts broken for multi-component templates (github issue #1955 from bp-kelley