schemas/public_.sql: analytical_stem_view: added links and definitions for half a dozen of the terms from various sources

schemas/public_.sql: analytical_stem_view: indicated provenance of the rest of the terms

schemas/public_.sql: analytical_stem_view: flagged the DwC terms

schemas/public_.sql: added plot.**.modify()

inputs/.TNRS/schema.sql: *_modify(): removed the need to manually maintain copies of the dependent view definitions with the *s in place, because the *s are now added automatically by view_def_to_orig()

inputs/.TNRS/schema.sql: *_modify(): removed the need to manually maintain copies of the dependent view definitions with the *s in place, because the *s are now added automatically by view_def_to_orig()

fix: schemas/util.sql: view_def_to_orig(): also need to merge .* expressions resulting from a SELECT * of a join, to avoid duplicated columns

fix: schemas/util.sql: view_def_to_orig(): require at least 6 cols to avoid false positives in the expansion match pattern

bugfix: schemas/util.sql: view_def_to_orig(): 1st col: can't prepend \y because it considers only \w chars, not "

bugfix: schemas/util.sql: view_def_to_orig(): don't match whitespace in the middle of a "" identifier, as this could throw off the parser