Fix array<...< to array<...>
SQL hint support fot default table for hinting columns

- Takes `defaultTables` as optional option and hint columns from that
table without explicitly mentioning table name.
- Update doc/manual.html for sql-hint addon.

Signed-off-by: Nisarg Jhaveri <nisarg.jhaveri@research.iiit.ac.in>
[sql-hint addon] Simplification