inputs/FIA/occurrence_all/import: Removed no longer applicable comment that directional joins are needed for PostgreSQL query planner to avoid slow sorts

inputs/FIA/TREE/import: Reclustered table by TREE.parent path index, to facilitate path-order joins

inputs/FIA/occurrence_all/import: Changed all RIGHT JOINs to inner joins so that tables would be joined in path order (i.e. general->specific). This optimizes the incremental joins so that the small tables are joined to each other before being joined to the large tables, rather than each row of the large tables being looked up in the small tables. This effect may not be noticeable for small LIMIT values, but would become apparent for large LIMIT values, such as the 1-million-row partitions used by db_xml.put_table() for column-based import. Note that inner joins used to cause the query planner to produce incorrect results containing slow sorts, but now this appears to no longer be an issue, perhaps because the result is not sorted by the TREE.ID index (which is not in the same order as the path indexes *.unique, *.parent).

inputs/FIA/occurrence_all/import: Removed trailing whitespace

Removed unused inputs/FIA/COND_unique/. Use COND instead.

inputs/FIA/import: Use `set -o errexit` instead of putting ` || exit` after each command

lib/import.sh: map_table(): Removed unneeded () around psql. This also fixes a bug where an error exit status from psql would not have aborted the script because `set -o errexit` does not apply to commands enclosed in (). For () you need to use ` || exit` instead (or ` || return` inside a function).

lib/import.sh: Use `set -o errexit` so any command that exits with an error aborts the script. Note that a command's exit status can still be ignored using ` || true`. Removed no longer needed ` || return` in functions.

schemas/util.sql: Renamed rename_if_exists() to try_create() because it can be used to create a column in any way, not just by renaming another column

lib/import.sh: functions: abort if a command encounters an error