tnrs_db: Updated with schema changes

schemas/vegbien.sql: taxonverbatim: Removed subclass relationship to taxonlabel in order to allow multiple taxonverbatims to point to the same taxonlabel. This involves adding a taxonverbatim_id serial column and pointing all fkeys to taxonverbatim to that column.

schemas/vegbien.sql: analytical_db_view: Fixed bug where needed to join on taxonverbatim before joining on taxonlabel, now that taxondetermination is linked directly to taxonverbatim. Interestingly, PostgreSQL did not flag this error when the schema was changed, but only when the schema was reloaded from the DDL.

schemas/vegbien.ERD.mwb: Moved taxonlabel to the right of taxonverbatim to make room for taxonverbatim to expand

schemas/vegbien.sql: Link taxondetermination to taxonverbatim (which is a subclass of taxonlabel) instead of directly to taxonlabel. This will enable later having multiple taxonverbatims for one taxonlabel.

schemas/vegbien.sql: taxonlabel: Renamed identifyingtaxonomicname to taxonomicname because the taxonomicname provided by the datasource is now in taxonverbatim, so there is no name collision. Note that both of these fields store the same type of information, but taxonlabel's is autogenerated while taxonverbatim's is verbatim (and is only set if provided by the datasource).

schemas/vegbien.sql: taxonlabel: Moved non-scoping fields to new taxonverbatim subclass table, which contains the component parts of the taxonlabel

schemas/vegbien.sql: taxonlabel: Renamed taxonlabel_2_propagate_canon_label_id() to taxonlabel_2_set_canon_label_id() for clarity

schemas/vegbien.sql: taxonlabel_2_propagate_canon_label_id(): If no matched taxonlabel, make self-reference. This fixes a bug in analytical_db_view where rows without a canon_label_id were excluded because they did not have a corresponding canonical taxonlabel.

schemas/vegbien.sql: taxonlabel_unique unique index: Removed binomial, author, taxonomicname, and morphospecies because these are now part of the identifyingtaxonomicname, which is also in the unique index