Ftw.testbrowser

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- Implement AT file upload widget, because the label does not work.
[jone]

- Implement file uploads.
[jone]

- Add "headers" property on the browser.
[jone]

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- Deprecate `normalized_text` method, replace it with `text` property.
The `text` property is more intuitive and easier to remember.
The `text` property has almost the same result as `normalized_text`,
but it represents `<br/>` and `<p>` with single and double newlines respectively.
`text` is to be the lxml `text` property, which contained the raw, non-recursive
text of the current node and is now available as `raw_text` property.
[jone]

- open_html: make debugging file contain passed HTML.
[jone]

- Sequence widget: implement custom form filling with label support and validation.
[jone]

- Sequence widget: add additional properties with inputs and options.
[jone]

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- Implement "query" method on autocomplete widget.
[jone]

- Implement form fill for z3cform datetime widget.
[jone]

- Fix setting attributes on nodes when wrapped with NodeWrapper.
[jone]

- Implement form fill for z3cform autocomplete widgets.
[jone]

- Implement form fill for z3cform sequence widgets.
[jone]

- Add ``webdav`` method for doing WebDAV requests with a ZServer.
[jone]

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- Add `open_html` method to browser object, allowing to pass in HTML directly.
[jone]

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- Add dexterity page object, refactor z3cform page object.
[jone]

- Add table nodes with helpers for table testing.
[jone]

- Merging "Nodes" lists returns a new "Nodes" list, not a "list".
[jone]

- Show containing elements in string representation of "Nodes" list.
[jone]

- Fix direct child selection with CSS (node.css(">tag")).
[jone]

- Add a ``recursive`` option to ``normalized_text``.
[jone]

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- When normalizing whitespaces, do also replace non-breaking spaces.
[jone]