pydata/pandas — pull request #8385 by derDieDasJojo (2014-09-25 08:49:11+00:00)
Title: add the parameter dropna to the function to_dict.

this is usefull because you cant reach the same effect by just using
dropna().to_dict() also see
http://stackoverflow.com/questions/26033301/make-pandas-dataframe-to-a-dict-and-dropna/26033302#26033302