Nod repository structure


As the number of nodes have increased in KNIME it becomes increasingly important for a logical tree of the nodes for users to appreciate what is available/possible.

From a user perspective, I struggle to see the use of the community and knime labs folders. For example why not have a sub folder in the chemistry section called community which contains CDK, RDKit etc.  for knime labs, why isn't parallel looping in the flow and loops section, decision tree ensemble in mining, optimisation in mining, neighbour grams in mining, whilst text processing and network mining probably deserve their own sections.