bumped version to 2.0.0-DEV
removed deprecated Twig_Filter_* classes
removed deprecated Twig_Function_* classes
removed deprecated Twig_Test_* classes
emptied deprecated interfaces
updated CHANGELOG
removed deprecated token parser broker
removed deprecated Twig_Environment::removeExtension()
improved the performance of the filesystem loader
removed the ability to register a global variable after the runtime or the extensions have been initialized
simplified code
simplified code
simplified code