Make getNode function public

The getNode function should be public so that DomElement objects can be accessed directly if need be.
[Process] Added ProcessBuilder::addEnvironmentVariables
[Intl] made RegionBundle and LanguageBundle merge fallback data when using a country-specific locale
[PropelBridge] PropelTypeGuesser can now recognize columns by their phpName

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

Until now, the `PropelTypeGuesser` could only find columns by their
name.
Example: `created_at` was recognized but `createdAt` wasn't.

This PR adds the ability to match column's phpNames (in a
case-insensitive way).
[Yaml] Fixed filename in the ParseException message
Merge branch '2.2' into 2.3

* 2.2:
  [BrowserKit] fixed method/files/content when redirecting a request
  [BrowserKit] removed some headers when redirecting a request
  [BrowserKit] fixed headers when redirecting if history is set to false (refs #8697)
  [BrowserKit] Pass headers when `followRedirect()` is called

Conflicts:
	src/Symfony/Component/BrowserKit/Client.php
	src/Symfony/Component/BrowserKit/Tests/ClientTest.php
Fixed annotation
merged branch enumag/patch-2 (PR #8912)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #8912).

Discussion
----------

Fixed annotation

See #8910.

Commits
-------

18ce361 Fixed annotation
Use isset() instead of array_key_exists() in DIC
merged branch catch56/container_array_key_exists (PR #8907)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #8907).

Discussion
----------

Use isset() instead of array_key_exists() in DIC

It doesn't look like the array_key_exists() in Container::get() and Container::has() is necessary. Changing this to isset() removed over 1,000 calls on a default Drupal 8 install - attaching before/after xhprof screenshots with this change.

![screen shot 2013-09-01 at 1 13 41 pm](https://f.cloud.github.com/assets/116285/1063965/d826057c-1300-11e3-96c3-2c94b89fe83a.png)

![screen shot 2013-09-01 at 1 13 49 pm](https://f.cloud.github.com/assets/116285/1063961/99a0f7b2-1300-11e3-9bd2-b0bf22d4245e.png)

Commits
-------

3c01ae6 Use isset() instead of array_key_exists() in DIC
Button missing getErrorsAsString() fixes #8084 Debug: Not calling undefined method anymore. If the form contained a submit button the call would fail and the debug of the form wasn't possible. Now it will work in all cases. This fixes #8084

Adding a test for the fix of getErrorAsString on Form.
Was throwing a fatal because of a method that did not exist on
the new element type button.
merged branch mikeSimonson/patch-1 (PR #8247)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #8247).

Discussion
----------

[Form][BUG]Button missing getErrorsAsString() fixes #8084

Debug: Not calling undefined method anymore.
If the form contained a submit button the call would fail and the debug of the form wasn't possible.
Now it will work in all cases.
This fixes #8084

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8084
| License       | MIT

Commits
-------

dab0688 [Form][BUG]Button missing getErrorsAsString() fixes #8084 Debug: Not calling undefined method anymore. If the form contained a submit button the call would fail and the debug of the form wasn't possible. Now it will work in all cases. This fixes #8084
[Translation] Added support for JSON format (both loader and dumper).
[Form] fix iterator typehint
merged branch Tobion/form-phpdoc (PR #8925)

This PR was merged into the 2.3 branch.

Discussion
----------

[Form] fix iterator phpdoc

It returns IteratorAggregate. But we probably only want to specify Traversable because that is was counts.

Fix from #8852

Commits
-------

f438ac3 [Form] fix iterator typehint
[Templating] deprecate DebuggerInterface

set logger in extension , so its only done in debug mode
add psr/log to suggest of templating
add test for setLogger and refactor tests to not depend that much an
deprecated functionality
removed unused variable
[HttpKernel] removed the need to use reflection to get a bundle namespace
[HttpKernel] removed a circular reference that prevents PHP GC to do its job
[DependencyInjection] remove code duplication from ContainerBuilder