Dealing with non-tuple cursors *or* introducing a row factory

[kgaughan]

The former depends on only on being able to tell if the row is a tuple, with the assumption otherwise being that it's a dict-like object. The may break, however, and will likely be slower than I'd like.

Alternatively, some kind of row factory can be implemented. This would be akin to the way the sqlite3 driver for Python works. This has the advantage of keeping the likes to query_value and query_column fast, but it may slow down query() and query_row().

I'm strongly leading towards the latter.

[kgaughan]

Done! Went down the row factory route.