renamed Symfony\Components to Symfony\Component
[TwigBundle] added a flash tag
[TwigBundle] made a small optimization
changed actions::render() helper method signature
[TwigBundle] fixed grammar for render helper.
removed Symfony\Framework

Things have been moved to Symfony\Component\HttpKernel
and Symfony\Bundle\FrameworkBundle

The kernel configuration namespace was removed and merged
with the main web configuration namespace (kernel:config => web:config,
kernel:test => web:test, and kernel:session => web:session):

Before:
<kernel:config charset="UTF-8" error_handler="null" />

<web:config csrf-secret="xxxxxxxxxx">
    <web:router resource="%kernel.root_dir%/config/routing.xml" />
    <web:validation enabled="true" annotations="true" />
</web:config>

After:
<web:config csrf-secret="xxxxxxxxxx" charset="UTF-8" error-handler="null">
    <web:router resource="%kernel.root_dir%/config/routing.xml" />
    <web:validation enabled="true" annotations="true" />
</web:config>

Renamed classes:

Symfony\{Framework => Bundle\FrameworkBundle}\Cache\Cache
Symfony\{Framework => Bundle\FrameworkBundle}\Client
Symfony\{Framework => Bundle\FrameworkBundle}\Debug\EventDispatcher
Symfony\{Framework => Bundle\FrameworkBundle}\Debug\EventDispatcherTraceableInterface
Symfony\{Framework => Bundle\FrameworkBundle}\EventDispatcher
Symfony\{Framework => Component\HttpFoundation}\UniversalClassLoader
Symfony\{Framework => Component\HttpKernel}\Bundle\Bundle
Symfony\{Framework => Component\HttpKernel}\Bundle\BundleInterface
Symfony\{Framework => Component\HttpKernel}\ClassCollectionLoader
Symfony\{Framework => Component\HttpKernel}\Debug\ErrorException
Symfony\{Framework => Component\HttpKernel}\Debug\ErrorHandler
Symfony\{Bundle\FrameworkBundle => Component\HttpKernel}\Debug\ExceptionListener
Symfony\{Framework => Component\HttpKernel}\Kernel
[TwigBundle] added helpers for translations
changed templating name notation

Old notation: bundle:section:name.format:renderer (where both format and renderer are optional)
New notation: bundle:section:name.format.renderer (where only format is optional)

Valid new template names: Blog:Post:index.php, Blog:Post:index.xml.php

The new notation is more explicit and put all templating engines on the same level (there is no
more the concept of a "default" templating engine).

Even if the notation changed, the semantic has not. So, the logical template name for the above
examples is still 'index'. So, if you use a database loader for instance, the template
name is 'index' and everything else are options.

Upgrading current applications can be easily done by appending .php to each existing template
name reference (in both controllers and templates), and changing :twig to .twig for Twig templates
(for twig templates, you should also add .twig within templates themselves when referencing
another Twig templates).
[TwigBundle] renamed Helpers to HelpersExtension
[TwigBundle] fixed trans tag
[TwigBundle] fixed trans tag
[TwigBundle] moved translator helpers to their own extension (removed usage of the magic _view variable context)
[TwigBundle] made trans and transchoice tags more flexible

Both tags accept variables now:

    {% trans label %}

    {% transchoice %}
      {{ error }}
    {% endtranschoice %}

Optionally, the with keywords allows to pass the placeholder values:

    {% trans label with vars %}
fixed HelpersExtension (removed usage of the magic _view context attribute -- helpers should now work from macros)
[TwigBundle] optimized calls to helpers
[TwigBundle] fixed typo
[TwigBundle] fixed trans tags
[TwigBundle] added the trans filter
[TwigBundle] updated nodes for the latest version of Twig
[TwigBundle] added tests for trans tag and filter