SPRING WEB FLOW CHANGE LOG
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Version 1.0.0 (28/12/2005)
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* Minor code cleanup & bug fixing.
* The "cacheSeconds" property now defaults to 0 for the WebFlowController.

Version 0.9.0 (17/03/2005)
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* Jar file manifest now specifies version number.
* License is now included in META-INF directory of jar file.
* Added getModelInputData() method to WebFlowController.
* Added Action.OK and Action.ERROR constants that define the very common "ok" and "error" events
  signaled by Action implementations.
* Added WebFlowUtils.getWebFlowMementoStack() method to get the web flow memento stack from
  the request.
* Added MultiAction: an action that allows you to bundle many actions into a single action
  implementation class.
* Added SignalEventAction: an action that takes a String value from the model and signals
  it as an action event.
* Added SimpleFormAction: an action that allows you to mimic the exact behaviour of the
  SimpleFormController in a flow.
* Added BirthDate sample application demonstrating the use of the SimpleFormAction.
* Added Maven project.xml POM.

Version 0.8.0 (26/02/2005)
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* Incorporated input from Steven Bazyl:
  - Refactored WebFlowCleanupFilter to ease subclassing. 
  - Added a method to WebFlowMementoStack returning the stack as a list that an action can expose
    to the view. Useful for certain things like breadcrumbs.
* Added readme.txt to distribution.
* Refactored WebFlowController so that there is no longer a 1-1 link between a controller and a
  top level flow. You can now specify the flow the WebFlowController should start using the
  "_flowName" request parameter. Consult the WebFlowController JavaDoc for details.
  NB: If you subclassed the WebFlowController, make sure to review your code because the signatures
  of some protected methods changed!
* Changed SimpleWebFlow so that it no longer exposes the actual flow model map in the ModelAndView
  objects it creates. Instead it uses the addAllObjects() method to expose the contents of the
  flow model.

Version 0.7.0 (17/12/2004)
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* Added FileUpload sample application.
* Improved BindAndValidateCommandAction: it now supports a "reuseCommand" property to indicate
  that an existing instance of the command object in the flow model should be reused.
* Restructured distribution archive a bit.

Version 0.6.0 (19/11/2004)
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* Several JavaDoc improvements.
* Builds now include debug attributes.
* The web flow controller now supports pluggable parameter extractors implementing the interface
  ParameterExtractor, 2 standard implementations are provided: RequestParameterValueParameterExtractor
  (the default) and RequestParameterNameParameterExtractor
* There is now a WebFlow interface, and the basic implementation of this interface is provided by
  the SimpleWebFlow class (which used to be called 'WebFlow'). This was done to allow other web flow
  implementations to be plugged into the controller. It also eases AOP proxying. Note that you
  will have to change your Spring bean definitions: change references to the 'WebFlow' class to
  use the new 'SimpleWebFlow' class which does exactly the same thing.
* Introduced NavigationException: a specialized web flow exception that is thrown when a web flow
  encounters a navigation problem.
* Added SubFlowBackNavigationExceptionResolver, which can try to resolve navigation problems with
  sub flows resulting from use of the browser 'Back' button.
* DTD validation is now forced while loading the web flow XML files.
* Added WebFlowCleanupFilter, a servlet 2.3 filter that will cleanup all expired web flows in an
  HTTP session.
* Added WebFlowUtils class with general purpose utility methods. This class also provides token handling
  similar to that in Struts to prevent double submits.
* The web flow controller now verifies the availability and validity of its web flow bean on initialisation.
* The flow id is now always available in the flow model so that actions can make use of it.
* Added ItemList sample application to demonstrate double submit handling and flow expiry.

Version 0.5.2 (02/11/2004)
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* Added this change log.
* Recompiled everything with Java 1.4.2 to avoid UnsupportedClassVersionError.
* Applied BSD style license: see license.txt.

Version 0.5.1 (01/11/2004)
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* First public release.