Remove spaces around equals sign in kwarg
Replace use of dict.has_key with 'in'.
Don't try to UTF-8 decode the GET query parameters.
They've already been turned into unicode strings for us.
Revert "Make merge_extents and fix_extents_overlap be methods of Query"

This reverts commit 2043cf5ae187a9cf3bde77b41d7556645b297604.
Rename Query._execute_sql to Query.execute_sql