Added test Min/Max validators should ignore empty string

Refs #3686
Min/Max Validators ignore empty string

Fixes #3686
Tests for PluralizationRules.
[TwigBundle] added support for custom loader paths

Before this commit, there was no ability to specify custom
search paths for Twig loader. Lets say we have twig templates
outside bundles directories (parts of the domain logic, not
application) - we want to be able to load them.

This commit adds `loader_paths` parameter to twig config,
which is used to set custom paths to the loader.
updated vendors
fixed incorrect reference to set*Service() method
[Component][Finder][SplFileInfo] file_get_contents=>fpassthru
reverted #4542
[FrameworkBundle] added a note about the classes cache
Fix error variable name.
merged branch Divi/patch-1 (PR #4762)

Commits
-------

b9c5182 Fix error variable name.

Discussion
----------

Fix error variable name.

If a user has a custom charset (not UTF-8), a message should appear, but the variable name is wrong, and we got this message :

```
Notice: Undefined variable: messages in C:\Work\Project\vendor\symfony\symfony\src\Symfony\Bundle\FrameworkBundle\DependencyInjection\Configuration.php line 57
```

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by 12k at 2012-07-05T12:28:03Z

![Not bad](http://29.media.tumblr.com/tumblr_lltzgnHi5F1qzib3wo1_400.jpg)
Add missing include in OptionsResolver README.md
merged branch merk/patch-3 (PR #4765)

Commits
-------

0a43d7d Add missing include in OptionsResolver README.md

Discussion
----------

Add missing include in OptionsResolver README.md

There was a missing interface in the readme.
[Component][HttpKernel] fixed testGetRootDir() on Win
[Form] refactored variable name to be more consistent with rest of the naming
[Security] fixed in_memory provider example
merged branch Inori/refactor-naming (PR #4767)

Commits
-------

819fe34 [Form] refactored variable name to be more consistent with rest of the naming

Discussion
----------

[Form] Refactored config variable naming to be more consistent

Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes

Since `clientTransformer` is renamed to `viewTransformer` everywhere, I think for consistency reasons config variable name should be changed too..

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by stloyd at 2012-07-06T07:31:39Z

Maybe also rename of `normTransformers` to `modelTransformers` ? As this were changed too.

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by Inori at 2012-07-06T07:40:53Z

@stloyd makes sense, done

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by bschussek at 2012-07-06T08:24:43Z

Thanks for the cleanup. Can you squash the commits and prefix the message with "[Form]" please?

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by Inori at 2012-07-06T08:43:49Z

@bschussek done

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by bschussek at 2012-07-06T09:31:04Z

Thanks! @fabpot :+1:
[Form] Compound forms now always need a data mapper. Otherwise an exception is thrown.
[Security] fixed automatic registration of the response listener when creating the listener

This is not a problem with Symfony, but when using the component
standalone (Silex for instance), the context listener might be
instantiated even if the firewall does not need to be fired. In that
case, the handle() method is not called, but the response listener is
called, which means that en empty token is stored in the session.

For Silex, it means that when authenticated, if you visit a 404 page,
you would be disconnected automatically.
[Form] Made data mappers completely responsible for dealing with empty values. Removed duplication of code.