Adapt security collector template name to webprofiler conventions
replaced deprecated Twig features
[Intl] Updated stubs to reflect ICU 51.2
updated CHANGELOG for 2.2.5
update CONTRIBUTORS for 2.2.5
updated VERSION for 2.2.5
bumped Symfony version to 2.2.6
updated CHANGELOG for 2.3.3
updated VERSION for 2.3.3
bumped Symfony version to 2.3.4-DEV
[HttpFoundation] added missing support for the new output API in PHP 5.4+
merged branch bschussek/icu51 (PR #8680)

This PR was merged into the 2.3 branch.

Discussion
----------

[Intl] Updated stubs to reflect ICU 51.2

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

In addition to the upgrade of the ICU component to ICU 51.2, this PR upgrades the stub classes to behave like their C counterparts do with ICU 51.2.

Commits
-------

8fa0453 [Intl] Updated stubs to reflect ICU 51.2
merged branch fabpot/twig-deprecated-features (PR #8675)

This PR was merged into the 2.2 branch.

Discussion
----------

replaced deprecated Twig features

| 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

As Symfony depends on Twig 1.11+, removing the usage of deprecated features will allow Symfony 2.2+ to work with Twig 2.0.

Commits
-------

322f880 replaced deprecated Twig features
made the filesystem loader compatible with Twig 2.0

Without adding the exists() method, the code happens to work by chance,
just because the current implementation of Twig exits() method calls
findTemplate().

But we know that it won't be the case anymore as of Twig 2.0.
merged branch fabpot/twig-filesystem-exists (PR #8677)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #8677).

Discussion
----------

[TwigBundle] made the filesystem loader compatible with Twig 2.0

| Q             | A
| ------------- | ---
| Bug fix?      | yes (for Twig 2.x)
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Without adding the exists() method, the code happens to work by chance,
just because the current implementation of Twig exits() method calls
findTemplate().

But we know that it won't be the case anymore as of Twig 2.0.

Commits
-------

d00548b [TwigBundle] made the filesystem loader compatible with Twig 2.0
merged branch hacfi/security_profiler_tpl (PR #8673)

This PR was merged into the master branch.

Discussion
----------

Adapt security collector template name to webprofiler conventions

| Q             | A
| ------------- | ---
| Bug fix?      | no, but syntax consistency & future compatibility(?)
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | fabpot/Twig#1156 which was reverted but will be merged in the future
| License       | MIT

Use Twig namespace syntax instead of bundle syntax for security webprofiler template to be consistent with @WebProfiler template names.

Commits
-------

66c792b Adapt security collector template name to webprofiler conventions
Fixed bug introduced in #8675
merged branch iteman/support_for_php_new_output_api (PR #8692)

This PR was merged into the master branch.

Discussion
----------

[HttpFoundation] add missing support for the new output API in PHP 5.4...

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

As of PHP 5.4, the new output API has been introduced:

* https://github.com/php/php-src/blob/master/README.NEW-OUTPUT-API
* https://github.com/php/php-src/commit/11d24c1593d6617f73d3f290617bd8994182f4dc
* https://bugs.php.net/bug.php?id=64977

Commits
-------

188c0ce [HttpFoundation] added missing support for the new output API in PHP 5.4+
merged branch WouterJ/fix_bug (PR #8696)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2][TwigBridge] Fix form_enctype bug

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

After a copy/past error in #8675, `{{ form_enctype() }}` was not working because it results in a `Class "Symfony\Bridge\Twig\Node\FormEnctypeNode" not found` error.

This should only be merged in 2.2, as of 2.3 this is moved to the `Symfony\Bridge\Twig\Node\FormEnctypeNode` class

Commits
-------

e0c7d3d Fixed bug introduced in #8675
added missing support for the new output API in PHP 5.4+