pydata/pandas — pull request #8448 by bertrandhaut (2014-10-03 08:08:26+00:00)
Title: Add support  of 'decimal' option to Series.to_csv and Dataframe.to_csv

The 'decimal' option exists for read_csv method but not yet in 'to_csv' methods.
The lack of this option is particulary painful when we *have to* work with Excel with European regional settings.

This modification add this option to both Series.to_csv and Dataframe.to_csv.