Grading doesn't cope with missing column names/headers very elegantly

[GoogleCodeExporter]

I accidentally missed off the column header by creating a spreadsheet and then 
adding a form. Grading started but the fields are all mixed up, rather than 
flubaroo picking up the fact that headers are missing.

Original issue reported on code.google.com by andrewr1...@googlemail.com on 9 Jan 2014 at 8:29