Doesn't handle quoted fields at all

[jpmckinney]

• Parses "bar\"baz" as "\"bar\"\"baz\""
• Parses "bar,baz" as "\"bar" and "baz\""
• Parses empty quoted field as "\"\"" instead of empty string ("")
• Doesn't fail on unescaped double quote, e.g. "foo"x"bar"
• Doesn't fail on unmatched quote, e.g. "Foo","Bar","Baz
• Doesn't fail on whitespace before quoted field, e.g. "Foo","Bar", "Baz"
• See #7