Update AIA roundtable.md

Hey, I've added several computational-photography issues that I'm working on in various ways right now -- see if you think these would be appropriate too. I think the description is fine, though I'm also operating on the assumption that the roundtables aren't highly selective. If I'm wrong, we might need more detail.
Merge pull request #1 from atomrab/patch-1

Update AIA roundtable.md