Update data push for screenly to use Alt name when available

[pvanspronsen]

@abrenoch
Could you update the script that pushes birthday's/anniversary to the screens to use the Alternate Name field or the "Display name publicly as" field in place of the Name field any time that the Alternate Name field has a value?

This would allow individuals who go by a name that differs from their legal name to be able to see their chosen name publicly.