add allow_extra_fields option
bumped Symfony version to 2.5.0
[Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM.
bug #10697 [Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM. (idn2104)

This PR was squashed before being merged into the 2.3 branch (closes #10697).

Discussion
----------

[Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM.

[Translation] HHVM throws when an invalid ResourceBundle is constructed, while zend returns FALSE from the constructor. This patch makes IcuResFileLoader and IcuDatFileLoader compatible with HHVM.

The following tests now pass on HHVM:
https://github.com/symfony/symfony/blob/2.3/src/Symfony/Component/Translation/Tests/Loader/IcuDatFileLoaderTest.php#L33
https://github.com/symfony/symfony/blob/2.3/src/Symfony/Component/Translation/Tests/Loader/IcuResFileLoaderTest.php#L54

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

Commits
-------

9bc08c0 [Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM.
[TwigBundle] removed undefined argument
[HttpKernel] fixed an error message
removed extra/unsupported arguments
made types consistent with those defined in Hack
bug #10700 Fixes various inconsistencies in the code (fabpot)

This PR was merged into the 2.3 branch.

Discussion
----------

Fixes various inconsistencies in the code

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
-------

4b7a275 removed extra/unsupported arguments
f4adfc4 [HttpKernel] fixed an error message
8aa322c [TwigBundle] removed undefined argument
[Validator] Add missing czech translations
Add support Thai translations
minor #10708 Add support Thai translations (liverbool)

This PR was squashed before being merged into the 2.3 branch (closes #10708).

Discussion
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Add support Thai translations

Add [Thai](http://www.thai-language.com/) translations to:
+ Symfony/Component/Validator/Resources/translations/
+ Symfony/Component/Security/Resources/translations/

Commits
-------

4bc2951 Add support Thai translations
minor #10712 [Validator] Added missing czech translations (jskvara)

This PR was merged into the 2.4 branch.

Discussion
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[Validator] Added missing czech translations

| Q             | A
| ------------- | ---
| Fixed tickets |
| License       | MIT

Added czech translations for strings from image validator #10672

Commits
-------

995ec72 [Validator] Add missing czech translations
made phpdoc types consistent with those defined in Hack
minor #10701 Made types used by Symfony compatible with the ones of Hack (fabpot)

This PR was merged into the 2.3 branch.

Discussion
----------

Made types used by Symfony compatible with the ones of Hack

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

PHP supports several ways to express types: like Boolean/bool or integer/int. Hack only supports one of them, so this PR proposes to use the Hack type to make Symfony a bit more "compatible" with Hack (gradual upgrade ;)).

Commits
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3c9c10f made phpdoc types consistent with those defined in Hack
0555b7f made types consistent with those defined in Hack
[Debug] Fixed ClassNotFoundFatalErrorHandler on windows.

Because $path is realpath'ed. So we have to use DIRECTORY_SEPARATOR
instead of / because the default directory separator on windows is
\. And so the str_replace can not work and can lead to a fatal error
because class could already be loaded. For example, the Response class
in symfony full stack is in the bootstrap.php.cache.
bug #10715 [Debug] Fixed ClassNotFoundFatalErrorHandler on windows. (lyrixx)

This PR was merged into the 2.4 branch.

Discussion
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[Debug] Fixed ClassNotFoundFatalErrorHandler on windows.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | no
| License       | MIT

Because `$path` is `realpath`'ed. So we have to use `DIRECTORY_SEPARATOR`
instead of `/` because the default directory separator on windows is
`\`. And so the `str_replace` can not work and can lead to a fatal error
because class could already be loaded. For example, the `Response` class
in symfony full stack is in the `bootstrap.php.cache`.

ping @nicolas-grekas

Commits
-------

2ce8cd9 [Debug] Fixed ClassNotFoundFatalErrorHandler on windows.
fixed types in phpdocs
made {@inheritdoc} annotations consistent across the board
minor #10713 made {@inheritdoc} annotations consistent across the board (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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made {@inheritdoc} annotations consistent across the board

| Q             | A
| ------------- | ---
| License       | MIT

Commits
-------

810b9ed made {@inheritdoc} annotations consistent across the board