Plug memory leaks: Call #finish after @dbh.execute.
Only call #finish with PostgreSQL driver.

MySQL seems to get confused if we finish (test suite).
Finish the #execute result in Model#set .  (Plugs memory leak.)
Condition on execution.finish in Model#set .
Don't memoize/cache prepared statements any more.

Model.prepare and Model#prepare may get refactored away in the future.
Plug memory leak: #finish prepared statement in Model's convenience setter methods.
Finish the statement, not the result set.
Plug memory leaks: Finish prepared statements.
Plug memory leak: #finish prepared statement in Model.create .
Plug memory leaks: #finish prepared statements in Model#select_all and #select_one .
Plug memory leaks: #finish prepared statements in Model.update and Model.update_one .
Refactor/revert some code re: result set #finish-ing.
Minor refactor of prepared statement finishing in Model#set .
Plug memory leak: #finish prepared statement in Model#delete .
Plug memory leaks in Collection: #finish prepared statements.
Use specific commit and branch of rdbi and rdbi-driver-postgresql .
Bump rdbi-driver-postgresql and pg gems.