RDKit nodes for knime

This contribution is the source code for a Java implementation of a number of cheminformatics nodes for the open-source workflow tool Knime (www.knime.org). The nodes are implemented using the RDKit, an open-source cheminformatics toolkit (www.rdkit.org) that NIBR has previously published source code for (OAK IDs 3157 and 1969, five pre-OAK submissions). The Knime nodes will be distributed using the same open-source license as Knime itself - the Gnu Public License (GPL) v3 - and will be published on a website hosted at www.knime.org. The Knime nodes in this submission are: 1) RDKit Canon Smiles: generate canonical smilees 2) RDKit Substructure Filter: do a substructure filtering using a SMARTS pattern 3) RDKit To Mol Converter: Convert a SMILES column into an RDKit molecule column 4) RDKit Fingerprint : generate fingerprints for molecules using a number of standard RDKit algorithms. 5) RDKit One Component Reaction: apply a chemical reaction to a single reactant table. 6) RDKit Two Component Reaction: apply a chemical reaction to two reactant tables. These nodes were implemented as part of the Cheminformatics Initiative