The NavigatorContext now holds a metadata stack
SerializationContext add visiting(Stack|Set) getters

This is consistent with the Context having a metadataStack getter
Added context for twig extension
Merge pull request #28 from adrienbrault/navigator-context-metadata-stack

The NavigatorContext now holds a metadata stack
adds handler for PhpCollection\Map
Added support for context creation inside twig.

{{ data|serialize('json', serialization_context().setGroups(['foo', 'bar'])) }}

{{ data|serialize('json', serialization_context().setVersion('1.0')) }}
Merge pull request #55 from smurfy/master

Adding context to twig extension