Speaker profile photos should be exportable

[felixc]

Just like we can export speaker bios, talk schedules, sponsor info, and sponsor logos, it would be great to be able to export speaker photos. That way they could be included in the mobile app along with the speaker bios.

I don't believe this is critical for this year, as we've not had speaker photos in the app in previous years either. However, if we do want to include them, it would be nicer to be able to export the data rather than have to write a scraper to get at it.