Attempt to add Farsi (Persian) to supported languages


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@22835 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
bugfix in comparison (path parameter for CurveCartesian)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@22838 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e