there are actually args passed through to prevent overwriting with null
args if they're passed
MINOR Added __get alias to remove need for explicit ->get() call
MINOR Added the injector instance as an object that can be injected into other classes
BUGFIX Fixed issue described in http://open.silverstripe.org/ticket/7448 whereby using the injector to create an object of a type already registered as a singleton would actually overwrite the stored singleton object
API CHANGE: Pass Object::create() calls to Injector::create().
API CHANGE: Add "RequestProcessor" injection point in Director, that Director will call preRequest() and postRequest() on.
