wrap dates in quotations

[etosch]

The date formatting includes a comma. Excel reads this correctly, but the csv parsing library doesn't. It treats the commas as column separators. We need to:

• update runner's response getter/writer to wrap all columns in quotations
• update the surveyman repository to then strip outer quotes.

I had a ton of headaches dealing with quotations for our first iteration of surveyman. Maybe the easiest way to deal with this is to html encode + quote?