Adding explicit flag (vs. positive-vs-negative node ID) to mark pinned nodes in multitree.
Adding multitree versions of tree-traversal procedures (in progress). Fixes and improvements to existing procedures to fix parent_node_id for pinned NCBI nodes.
Aborted switch from subqueries to FIND_IN_SET(), will try converting to JOIN instead...
Converted subqueries in refreshMultitree() to INNER JOIN, with minor performance boost.
Adding test code (SQL) for generating a user-contributed calibration and its tree, then querying the multitree for results (ongoing).
All stored procedures (and test code) revised and tested to work with multitree.