Moving non-Nexson vars to query-string for save
Much faster way of filtering OTU list by tree

This looks funky, but is waaay faster than the old method, which checked node IDs individually in each tree, for each OTU. Now we build a temporary (very large) associative array whose properties are the OTU ids for matching trees, then check for the existing of these properties. See the abandoned branch 'new-ko-mapping-plugin' for slower (tested) alternatives.
Dynamic page headings, based on live metadata
Working on tree display for huge trees (ongoing)