schemas/vegbien.sql: plantname: Added comment documenting how to include a taxon name at a rank with no explicit column, by using the plantname table as an ordered linked list linked together using parent_id. (This method of using a linked list is one way of storing an ordered list of user-defined data. It is similar to using locationevent.previous_id to link successive reobservations of the same location together.) Note that plantname can store both the official tree of life and the data provider's own custom tree of life (or a subset thereof), with the two being distinguished by whether the data provider's or TNRS's taxondeterminations point to them.

schemas/vegbien.sql: plantname: Added verbatimrank to store ranks of custom taxonomic levels, such as rosids. Note that even if you specify a custom verbatimrank, you must also specify a closest-match rank from the taxonrank closed list. This ensures that every taxonomic name is placed in the correct relative order in the taxonomic hierarchy.

schemas/vegbien.sql: plantconcept: Made plantname_id optional because the datasource's plantconcepts do not need to be placed in the recursive plantname hierarchy

schemas/vegbien.sql: plantconcept: Added datasource_id and appropriate unique indexes to enable scoping by datasource. Moved plantcode right after datasource_id because it will be used for the sourceaccessioncode (if any).

schemas/vegbien.sql: Moved plantconcept.plantdescription to plantname and renamed it to description, so that a taxon of any rank can have a description

schemas/vegbien.sql: plantconcept: Added denormalized taxonomic ranks from <https://projects.nceas.ucsb.edu/nceas/projects/bien/wiki/VegBIEN_taxonomic_schema#Primary> and concatenated scientific name fields

Removed no longer used ucase_first

Removed no longer used bin/union

Removed no longer used join_union_sort

Removed no longer used ci_map, because all relevant mapping scripts are now case-insensitive