This adds new Twig configuration options that make it possible to
configure the format of both numbers and dates as well as timezones
without the need to write custom code.
For example, using the new configuration options can look like this:
```yaml
twig:
date:
format: d.m.Y, H:i:s
interval_format: %%d days
timezone: Europe/Berlin
number_format:
decimals: 2
decimal_point: ,
thousands_separator: .
```
- Added compiler class which picks up any services tagged "twig.loader"
- If there is one loader registered we set the alias to this loader
- If there is more than one we set the alias to a chain loader and all
the loaders to it
- If there is no loaders we throw an Exception
In a template, you can now use native Twig template names, instead of
the Symfony ones:
Before (still works):
{% extends "AcmeDemoBundle::layout.html.twig" %}
{% include "AcmeDemoBundle:Foo:bar.html.twig" %}
After:
{% extends "@AcmeDemo/layout.html.twig" %}
{% include "@AcmeDemo/Foo/bar.html.twig" %}
Using native template names is also faster.
The only drawback is that the new notation looks similar to the way we
locate resources in Symfony, which would be
@AcmeDemoBundle/Resources/views/Foo/bar.html.twig. We could have used
the same notation, but it is rather verbose (and by the way, using this
notation did not work anyway in templates).
