sql_gen.py: map_expr(): Fixed bug where names were being replaced when they were inside another name. This occurred with combined names created by sql_io.into_table_name().

sql.py: ConstraintException: message: Wrap condition in strings.as_tt()

sql.py: run_query(): DuplicateKeyException: Also retrieve the index's condition using new index_cond()

sql.py: Added index_cond()

sql_io.py: put_table(): insert_into_pkeys(): Take a query as the param instead of sql.mk_select()'s params, to allow the caller to pass in any query without needing insert_into_pkeys() to manually pass through those args

sql.py: constraint_cond(): Fixed NotImplementedError message to apply to this function

sql_io.py: put_table(): ignore_cond(): Log message: Replaced don't with do not so it wouldn't mess up syntax highlighting when viewing the log file in a text editor

input.Makefile: Staging tables installation: Don't delete %/header.csv on error, because header.csv is a byproduct rather than the primary output and is created roughly atomically

schemas/vegbien.sql: *_ancestor tables: Added descriptive comment that these are ancestor cross link tables

csvs.py: sniff(): Support multi-char delims using \t, such as \t|\t used by NCBI. Support custom line suffixes, such as \t| used by NCBI.