Add _setSeperator flag to CsvView and Readme

this is needed because some CSV-Editors (especially Microsoft Office) cant open the file if the location is set to a location where the currency seperator is equal to the seperator in the csv. The result is that the values are in one column (not split into columns).
The sep= indicator defines the seperator see german wikipedia [1]. I deactivated it by default so it wont bother users of other readers (ex. Libre Office).


[1] http://de.wikipedia.org/wiki/CSV_%28Dateiformat%29#Besonderheiten_beim_Import