Issue #2003482 by pwolanin, jhodgdon, kim.pepper, Nick_vh, tim.plunkett, jibran, Berdir, effulgentsia, alexpott: Convert hook_search_info() to plugin system.
Issue #2076681 by damiankloip, dawehner, pwolanin: Add a YAML discovery decorator.
Issue #2068287 by Berdir, andypost: Support bundle names provided in the request arguments in EntityCreateAccessCheck.
Issue #752730 by c960657, sun, swentel, catch: Remove file_exists() during bootstrap.
Issue #1978952 followup by tim.plunkett, disasm: Fixed Regression: Convert shortcut_set_add() to a Controller.
AnnotatedClassDiscovery with PSR-4 style directories.
Introduce AbstractAnnotatedClassDiscovery
Change the way that annotation namespaces are added to AnnotatedClassDiscovery. Introduce addAnnotationNamespace().
change constructor signature of DefaultPluginManager, and give it an addAnnotationClass() method.
Allow annotation namespaces with multiple directories attached