Use Norm Data instead of Data

This listener is triggered when normalized data are binded.

We have to use $event->getForm()->getNormData() instead of $event->getForm()->getData().
merged branch sterrien/patch-1 (PR #5842)

This PR was merged into the 2.0 branch.

Commits
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2d9a6fc Use Norm Data instead of Data

Discussion
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[Form] Use Norm Data instead of App Data

This listener is triggered when normalized data are binded.

We have to use $event->getForm()->getNormData() instead of $event->getForm()->getData().

I have made a new FormType having 'entity' as parent and having a NormTransformer. I encountered a problem in MergeCollectionListener when the request is binded.

My commit fix it.
updated license year
Merge branch '2.0' into 2.1

* 2.0:
  updated license year
  Update src/Symfony/Component/HttpFoundation/Response.php
  [Console] fixed unitialized properties (closes #5935)
  [Bundle] [FrameworkBundle] fixed typo in phpdoc of the SessionListener.
  bumped Symfony version to 2.0.21-DEV
  updated VERSION for 2.0.21
  updated CHANGELOG for 2.0.21

Conflicts:
	src/Symfony/Bundle/SwiftmailerBundle/LICENSE
	src/Symfony/Component/Filesystem/LICENSE
	src/Symfony/Component/HttpFoundation/Response.php
	src/Symfony/Component/HttpKernel/Kernel.php