1.0.4

• Fixed statement reference counts if the same statement was prepared simultaneously on a single connection.
• The pool no longer caches statement pools internally. If you reuse a statement very frequently, it is recommended to retain a reference to the statement object returned from the pool for better performance. (#19)
• Removed a circular reference within Connection that could delay automatic destruction and closure of a single connection.
• Added back-pressure to unbuffered queries to improve memory consumption of large result sets.