schemas/public_.sql: ran analytical_stem_view_modify(), which transfers the column COMMENTs from analytical_stem_view to analytical_stem

bugfix: schemas/util.sql: view_def_to_orig(): need to handle cases when list of cols from the same table is not an expanded * expression

schemas/util.sql: added view_is_subset(view_def text)

schemas/util.sql: added view_is_automatically_updatable(view_def text)

bugfix: schemas/util.sql: show_create_view(): use the overridden version of pg_get_viewdef(), which supports expanded * expressions. this was possibly being used already whenever util happened to be in the search_path.

bugfix: schemas/public_.sql: analytical_stem_view_modify(): updated to new analytical_stem_view column names

fix: schemas/public_.sql: analytical_stem_view derived and related views: applied data dictionary renamings, using the steps at wiki.vegpath.org/VegBIEN_schema_refactoring#apply-data-dictionary-renamings-to-database but with the current columns of analytical_stem as the left-hand column

bugfix: schemas/public_.sql: analytical_stem_view_modify(): updated to new analytical_stem_view column names

schemas/public_.sql: analytical_stem_view: applied data dictionary renamings, using the steps at wiki.vegpath.org/VegBIEN_schema_refactoring#apply-data-dictionary-renamings-to-database

lib/tnrs.py: source_sorting (Constrain by Source): documented the different behavior for this in each match mode (all-matches and best-match)