Rename column or color in-place.

        Method wraps::

                tabular.spreadsheet.renamecol(self, old, new)

def renamecol(self, old, new):
        """
        Rename column or color in-place.

        Method wraps::

                tabular.spreadsheet.renamecol(self, old, new)

        """
        spreadsheet.renamecol(self,old,new)
        for x in self.coloring.keys():
            if old in self.coloring[x]:
                ind = self.coloring[x].index(old)
                self.coloring[x][ind] = new