Change Python version support from 2.x to 2.6, 2.7 and 3.3.
Update info in README.
README formatting.
Fix escape_item() for py3k.
Fix typo in connections.py.
Fix escape_string().
Fix query string formatting for py3k.
Don't run example test, because it depends on external data.
Run third-party tests on all supported Python versions.
Interger division must be explicit for Py3k.
Fix escape_int().
query must by str/bytes, not unicode/str.
Py3k string normalization.