- [bug] bulk_insert() fixes:

- [bug] bulk_insert() fixes:

    1. bulk_insert() operation was
       not working most likely since the 0.2 series
       when used with an engine. #41
    2. Repaired bulk_insert() to complete when
       used against a lower-case-t table and executing
       with only one set of parameters, working
       around SQLAlchemy bug #2461 in this regard.
    3. bulk_insert() uses "inline=True" so that phrases
       like RETURNING and such don't get invoked for
       single-row bulk inserts.
    4. bulk_insert() will check that you're passing
       a list of dictionaries in, raises TypeError
       if not detected.