CHANGELOG
=========
2.2.0
-----
* added a `controller` function to help generating controller references
* added a `render_esi` and a `render_hinclude` function
* [BC BREAK] restricted the `render` tag to only accept URIs or ControllerReference instances (the signature changed)
* added a `render` function to render a request
* The `app` global variable is now injected even when using the twig service directly.
* Added an optional parameter to the `path` and `url` function which allows to generate
relative paths (e.g. "../parent-file") and scheme-relative URLs (e.g. "//example.com/dir/file").
2.1.0
* added global variables access in a form theme
* added TwigEngine
* added TwigExtractor
* added a csrf_token function
* added a way to specify a default domain for a Twig template (via the
'trans_default_domain' tag)
