bugfix: bin/import_times: filtering out the Source subdirs: need to match 1 at the beginning of the line only

bin/import_times: filter out the Source subdirs, which now have single-row data and therefore are included in the rowcounts list

inputs/U/: switched to new-style import, using the steps at http://wiki.vegpath.org/Adding_new-style_import_to_a_datasource

bugfix: schemas/util.sql: reset_col_names(): remove metadata value columns from the map table entirely, so that they are not considered to be in the table (old-style import does not use metadata value columns, so there would be no column or a different column in the metadata value column's slot)

bugfix: schemas/util.sql: trim(): need to remove all added columns, not just derived columns, because metadata value columns are also added by new-style import and need to be removed to restore a staging table to its pre-new-style state

schemas/util.sql: added added_cols()

bugfix: schemas/util.sql: reset_col_names(): need to avoid renaming metadata value columns, because the "from" entry is a value, not a column name

inputs/U/Specimen/map.csv: translated remaining multi-column filters to postprocessing derived columns, using the steps at http://wiki.vegpath.org/Adding_new-style_import_to_a_datasource#Translating-filters-to-postprocessing-derived-columns

inputs/CVS/stemLocation_/test.xml.ref: set inserted row count back. it had changed because $version was still set in the environment, and this was causing a non-emtpty public schema to be used as the testing schema.

inputs/CVS/stemLocation_/test.xml.ref: updated inserted row count