* alexandresalome/feat-routing-exceptions:
[Routing] Fix the exception inheritance + Add the LICENCE block in new files
[Routing] Change the Exception namespacing + base class for every exception + update PHPDoc
[Routing] Add specific exceptions for the UrlGenerator
When generating URL, thrown exceptions are InvalidArgumentException and
distinction of errors is quite difficult. This modification brings different
exceptions for different cases
The _scheme requirement can be used to force routes to always match one given scheme
and to always be generated with the given scheme.
So, if _scheme is set to https, URL generation will force an absolute URL if the
current scheme is http. And if you request the URL with http, you will be redirected
to the https URL.
This improves, for example, the exception one would receive if they tried to import a resource from a bundle that doesn't exist.
Previously, the deep "bundle is not activated" exception would be thrown. That has value, however there is no indication of where
the exception is actually occurring.
In this new implementation, we throw an exception that explains exactly which resource, and from which source resource, cannot be
loaded. The deeper exception is still thrown as a nested exception.
Two caveats:
* The `HttpKernel::varToString` method was replicated
* This introduces a new `Exception` class, which allows us to prevent lot's of exceptions from nesting into each other in the case
that some deeply imported resource cannot be imported (each upstream import that fails doesn't add its own exception).
* subsven/master:
re-add filename based directory filter to the AnnotationDirectoryLoader, now restricting to *.php files and therefore disregarding e.g. SVN metadata files
revert adding filename based filter to the directory resource
Eleminate the need to manually clear the cache if a new controller file containing routing annotations is added - part II * add unit tests * introduce filename filter to DirectoryResource (to restrict change monitoring to a subset of files) * modify AnnotationDirectoryLoader.php to use filename filter set on Controller\.php$
