[yoz]

Very nice! I hit some severe bugs but got several queries working that I didn't expect, such as:

   Add a column named "FirstLetter" with the first letter of "name"

Bugs:

1. In a couple of my test CSVs, some columns were completely blank in the view, though the data came through in queries. I suspect it happens with columns that have values too wide for the cell.

2. 'Group by' queries caused a Python exception in the console log: "AttributeError: 'Series' object has no attribute 'columns'"