Merge pull request #10 from lorcan/master

xml2csv generates comma-separated CSV files rather than comma plus space CSV files by default
fix readme: change extension to fit example
Merge pull request #11 from billwanjohi/master

fix readme: change extension to fit example
Merge pull request #12 from lorcan/master

Corrected some documentation
Merge remote-tracking branch 'upstream/master'
Double-quotes are escaped by preceding them with another double-quote

As per [RFC 4180 Section
2.7](http://tools.ietf.org/html/rfc4180#section-2):
> If double-quotes are used to enclose fields, then a double-quote
appearing inside a field must be escaped by preceding it with another
double quote.