ENH: Retrieve original data from parent environment

[sinhrks]

There are some classes which doesn't hold original data itself, but stores a call signature when the model was created. If autoplot can retrieve original data from parent environment, we can omit the explicit data keyword.

Some standard function behave like above, but it can be an unexpected result if the original variable has been changed. Thus this behavior should be explicitly turned on by global option (or argument).