initial commit
handle scalar value
Add License, Readme
Add basic support for service container
Add tests loader
Add support for Reference
Handle cyclic reference
Fix initialization, add travis.yml file
Add support for parameters
Add package information
Handle array parameters
Add logger
update version
Add support for method call
Raise exception on missing parameter
Fix class initialization, add extension
Inject the container as service_container service
Add support for weak reference
Fix support for WeakReference
Update README file