TODOs

This file tracks backwards-incompatible tasks for a major rewrite.

Do not catch exceptions inside class, leave it to client implementation instead.
Rewrite and require PHP 5.3+, leverage (vendor) namespaces, rename to Mollom\Client.
Add unit tests based on PHPUnit.
Re-implement based on Guzzle, leverage its OAuth plugin and support for Web Service Definitions (WSD).