Brain.save_movie() II

Alternative to https://github.com/nipy/PySurfer/pull/79 co-opting `Brain.make_montage()`

I don't think it's a huge deal, but properties are generally preferred to
`get_*` methods.

On Fri, Dec 19, 2014 at 11:56 AM, Christian Brodbeck <
notifications@github.com> wrote:
>
> In surfer/viz.py
> <https://github.com/nipy/PySurfer/pull/89#discussion-diff-22115003>:
>
> >                      self.update_text(data["time_label"] % time, "time_label")
> >          self._toggle_render(True, views)
> >
> > +    def get_data_time_index(self):
>
> It could potentially, would you prefer a property?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/nipy/PySurfer/pull/89/files#r22115003>.
>