On shutdown do not handle errors that can be handled by the registered error handler.

We do this, because we are not able to inspect the error control operator examining
the output of error_get_last().

@see http://php.net/manual/en/language.operators.errorcontrol.php
@see http://www.php.net/manual/en/function.set-error-handler.php
Remove an exception for strict errors in Run.php

There is no indication why that special handling is necessary,
as it should be picked up by the regular error handling,
as every other type of error in the current file.
Merge branch 'feature/error-control-operator-support'