Improve stars handling and put FOV filtering into set_stars()

[taldcroft]

The driver here is having the full list of stars (via radial selection from AGASC) available to allow roll optimization. Now the ACATable catalog has the full list and acqs, fids, and guides have the FOV-filtered list (where FOV means within 40 pixels of the CCD edge).

The key code change is moving the FOV-filtering from StarsTable.from_stars() into ACACatalogTable.set_stars(), and adding a new arg to the latter to turn-off FOV-filtering if required.