sql_io.py: cast_temp_col(): add_col()'s distinguishing comment param: Add the type in case the same input column is being cast to different types, and both types have the same first word (causing their new column names to be the same)

sql_io.py: cast_temp_col(): Name the new column with only the first word of the type, to save space in the limited identifier length

strings.py: Added first_word()

sql_io.py: cast_temp_col(): Use sql_gen.suffixed_col() to create the new column name

inputs/import.stats.xls: Added run time for SALVIAS organisms, which just finished

inputs/import.stats.xls: Use [1]-style footnotes because copying and pasting to Gmail doesn't preserve the superscripts

inputs/import.stats.xls: Updated for latest simultaneous column-based import

sql_io.py: cast_temp_col(): Don't automatically create an index on the new column, because it doesn't necessarily need an index and the main index used for the join is now added automatically by distinct_table()

sql.py: flatten(): Don't automatically create indexes on all columns, because most columns don't need indexes and the main index used for the join is now added automatically by distinct_table()

sql.py: Removed no longer needed add_index_col() and ensure_not_null() because we are not using index columns