CHANGELOG
=========
2.2.0
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* added Extension::isConfigEnabled() to ease working with enableable configurations
* added an Extension base class with sensible defaults to be used in conjunction
with the Config component.
* added PrependExtensionInterface (to be able to allow extensions to prepend
application configuration settings for any Bundle)
2.1.0
* added IntrospectableContainerInterface (to be able to check if a service
has been initialized or not)
* added ConfigurationExtensionInterface
* added Definition::clearTag()
* component exceptions that inherit base SPL classes are now used exclusively
(this includes dumped containers)
* [BC BREAK] fixed unescaping of class arguments, method
ParameterBag::unescapeValue() was made public