Csv quote char

This will allow users to configure a different quoting char in cases where the data may not exactly fit the csv standard.

A common example may be to completely ignore the quote char, and to do this a null \x00 char can be used instead.
Another example may be csv with ' as the quote char instead of "

An example of this being useful:
http://stackoverflow.com/questions/8073920/importing-csv-quoting-error-is-driving-me-nuts