Version 0.2.2

The release 0.2.2 has been validated on IE 6 and Firefox 2.0.0.11. Volunteers are welcome to test it on other plate forms. It contains:
- By default, the layout is textual but it can also use icons
- By default, it stores the state in cookies
- It supports removing nodes and altering visual properties after construction
- If configured it implements a lazy construction. The HTML object are created only for visible nodes. It is useful when many nodes must be loaded.
- A new object implements a dynamic construction using AJAX. Only the definition of visible nodes (and their direct children) is loaded. It is useful for large tree like file system view.