Score another one for the Food Babe? Though she has been pilloried in some media reports in recent months, Charlotte-based activist Vani Hari has stepped forward and taken at least partial credit for Kraft Foods' (NASDAQ: KRFT) revelation late last week that it will remove synthetic dyes and artificial preservatives from its popular packaged Macaroni & Cheese product by 2016. According to a report in the Chicago Tribune, Kraft executives said the decision to remove the dyes and preservatives was…