Ajja

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- Add ability to send a CSRF token with every request. This token must be
available via the id `csrf_token` (can be customized) in the DOM.

- Added minified versions of javascript resources.

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- Bugfix: Use ``indexOf`` instead of ``startsWith``, which is not available on
all browsers.

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- Declare ``for`` attribute on form labels.

- Store "save on change" subscriptions so they can be cancelled.

- Ignore ``null`` values for data fields. (1)

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- Made it possible to define templates as template files on file system.

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- Add events ``after-load`` and ``after-save``.

- Fix ``JSON`` serialization to be able to handle Knockout observables.

- Added ``reload`` functionality to the form class.

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- Made it possible to preselect values in arrays when the form is rendered.

- Changed form submit behaviour:

- Default submit type is not ``POST`` instead of ``GET``. (Change it with the
``save_type`` option)

- Data is now submitted as ``JSON`` type.