Log Message:
Update to 2.5.3:

What's new in psycopg 2.5.3
^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Work around `pip issue #1630 <https://github.com/pypa/pip/issues/1630>`__
  making installation via ``pip -e git+url`` impossible (:ticket:`#18`).
- Copy operations correctly set the `cursor.rowcount` attribute
  (:ticket:`#180`).
- It is now possible to call `get_transaction_status()` on closed connections.
- Fixed unsafe access to object names causing assertion failures in
  Python 3 debug builds (:ticket:`#188`).
- Mark the connection closed if found broken on `poll()` (from :ticket:`#192`
  discussion)
- Fixed handling of dsn and closed attributes in connection subclasses
  failing to connect (from :ticket:`#192` discussion).
- Added arbitrary but stable order to `Range` objects, thanks to
  Chris Withers (:ticket:`#193`).
- Avoid blocking async connections on connect (:ticket:`#194`). Thanks to
  Adam Petrovich for the bug report and diagnosis.
- Don't segfault using poorly defined cursor subclasses which forgot to call
  the superclass init (:ticket:`#195`).
- Mark the connection closed when a Socket connection is broken, as it
  happens for TCP connections instead (:ticket:`#196`).
- Fixed overflow opening a lobject with an oid not fitting in a signed int
  (:ticket:`#203`).
- Fixed handling of explicit default ``cursor_factory=None`` in
  `connection.cursor()` (:ticket:`#210`).
- Fixed possible segfault in named cursors creation.
- Fixed debug build on Windows, thanks to James Emerton.