mappings/VegCore-VegBIEN.csv: Mapped accordingTo to taxonconcept.creator_id, and have it take the place of identifiedBy when both are present

mappings/VegCore-VegBIEN.csv: Remapped people's names split apart into name components in party to new party.fullname, which does not require splitting or make assumptions about the number of people who may be listed in a particular name field and which components of their name(s) are present

schemas/vegbien.sql: party: Added fullname

mappings/VegCore.csv: Added accordingTo

inputs/.TNRS/tnrs/map.csv: Mapped Name_matched_url to scientificNameID, since the URL uniquely identifies the matched taxonconcept

schemas/vegbien.sql: taxonconcept: Renamed taxonname to taxonepithet for clarity and to be consistent with TCS's use of "epithet" to denote what the taxonname was intended to be (http://www.tdwg.org/standards/117/download/#/UserGuidev_1.3.pdf)

schemas/vegbien.sql: taxonconcept.creator_id: Documented that this is the concept reference for a taxon concept with an "according to", or the identifier's name for a nominal concept, and is equivalent to "Name sec. x"

sql_io.py: import_csv(): Add a row_num column at the beginning of the table, which is autopopulated by csvs.RowNumFilter (it cannot be autopopulated by the serial datatype, because this does not support COPY FROM with a NULL-equivalent value in the serial field). This fixes a bug in csv2db where rows would not stay in inserted order upon querying the table, and would be returned in a different order each query, which prevented LIMIT/OFFSET based subsetting from returning consistent, nonoverlapping results. This occurs because PostgreSQL unfortunately does not return rows in inserted order (or any stable order: "If sorting is not chosen, the rows will be returned in an unspecified order [which] must not be relied on" <http://www.postgresql.org/docs/8.3/static/queries-order.html&gt;), so an explicit ORDER BY is always needed to ensure staging table rows are retrievable in the order they were inserted.

csvs.py: Added RowNumFilter, which adds a row # column at the beginning of each row

streams.py: LineCountStream, LineCountInputStream: Fixed bug where line_num was 1 too high because it started at 1 and was incremented before each line is returned. It now properly starts at 1, but the initial line_num value is 0 to increment to 1 upon encountering the first line. This off-by-one behavior may have been needed for code that associates an error message with a line #, but such code should add 1 to the line_num to get the line # of the error if the error prevents the next line from being read by the LineCount*Stream.