[Translator] coding style
[Translator] fix MessageCatalogueInterface::getFallbackCatalogue that can return null

also use inheritdoc for the implementation
[Translator] mention that the message id may also be an object that can be cast to string in TranslatorInterface and fix the IdentityTranslator that did not respect this
[Translator] fix phpdoc of MessageCatalogueInterface::add and ::replace
[Translator] optimized adding of resources and saving a call to array_unique
[Translator] fix typecast in transChoice
[Translator] fix metadata

- fix '0' problem
- only access metadata when implementing interface
- refactor code
- clarify phpdoc
[Translation] added xliff loader/dumper with resname support
[Translation] removed wriong 'use'
Merge branch '2.1' into 2.2

* 2.1:
  sub-requests are now created with the same class as their parent
  [FrameworkBundle] removed BC break
  [FrameworkBundle] changed temp kernel name in cache:clear
  [DoctrineBridge] Avoids blob values to be logged by doctrine
  [Security] use current request attributes to generate redirect url?
  [Validator] fix showing wrong max file size for upload errors
  [TwigBridge] removed double var initialization (refs #7344)
  [2.1][TwigBridge] Fixes Issue #7342 in TwigBridge
  [FrameworkBundle] fixed cahe:clear command's warmup
  [TwigBridge] now enter/leave scope on Twig_Node_Module
  [TwigBridge] fixed fixed scope & trans_default_domain node visitor
  [TwigBridge] fixed non probant tests & added new one
  [BrowserKit] added ability to ignored malformed set-cookie header
  [Translation] removed wriong 'use'
  [Translation] added xliff loader/dumper with resname support
  [TwigBridge] fixes

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/HttpKernel.php
	src/Symfony/Component/Security/Http/HttpUtils.php
	src/Symfony/Component/Translation/Loader/XliffFileLoader.php
	src/Symfony/Component/Translation/Tests/Loader/XliffFileLoaderTest.php
merged branch Tobion/trans-refactor (PR #7058)

This PR was merged into the 2.2 branch.

Commits
-------

0992032 [Translator] fix metadata
3b71000 [Translator] fix typecast in transChoice
88f98c9 [Translator] optimized adding of resources and saving a call to array_unique
e88bf7b [Translator] fix phpdoc of MessageCatalogueInterface::add and ::replace
c97ee8d [Translator] mention that the message id may also be an object that can be cast to string in TranslatorInterface and fix the IdentityTranslator that did not respect this
5a36b2d [Translator] fix MessageCatalogueInterface::getFallbackCatalogue that can return null
d1c34e8 [Translator] coding style

Discussion
----------

[Translator] several fixes and refactorings

Reasoning see individual commits.

BC break: no <del>yes because I added an array typehint to `MessageCatalogueInterface::add` and `::replace` since it's required. I could remove the typhint again so there would be no bc break, but IMO having it is much more explicit and consistent as there are already other array typhints as in the constructor.</del>

---------------------------------------------------------------------------

by Tobion at 2013-02-14T09:36:35Z

@fabpot removed typehint and code movement. Added 2 more commits.

---------------------------------------------------------------------------

by Tobion at 2013-03-04T16:14:37Z

@fabpot ping
Merge branch '2.2'

* 2.2: (70 commits)
  change wrapped exception message to be more usefull
  updated VERSION for 2.0.23
  update CONTRIBUTORS for 2.0.23
  updated CHANGELOG for 2.0.23
  [Form] fixed failing test
  [DomCrawler] added support for query string with slash
  Fixed invalid file path for hiddeninput.exe on Windows.
  fix xsd definition for strict-requirements
  [WebProfilerBundle] Fixed the toolbar styles to apply them in IE8
  [ClassLoader] fixed heredocs handling
  fixed handling of heredocs
  Add a public modifier to an interface method
  removing xdebug extension
  [HttpRequest] fixes Request::getLanguages() bug
  [HttpCache] added a test (cached content should be kept after purging)
  [DoctrineBridge] Fixed non-utf-8 recognition
  [Security] fixed HttpUtils class tests
  replaced new occurences of 'Request::create()' with '::create()'
  changed sub-requests creation to '::create()'
  fixed merge issue
  ...

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
	src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar.html.twig
	src/Symfony/Component/DomCrawler/Link.php
	src/Symfony/Component/Translation/Translator.php