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csv.py - read/write/investigate CSV files
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"Sniffs" the format of a CSV file (i.e. delimiter, quotechar)
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The delimiter /should/ occur the same number of times on
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2) build a table of frequencies of this frequency (meta-frequency?),
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3) use the mode of the meta-frequency to determine the /expected/
frequency for that character
4) find out how often the character actually meets that goal
5) the character that best meets its goal is the delimiter
For performance reasons, the data is evaluated in chunks, so it can
try and evaluate the smallest portion of the data possible, evaluating
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