Force UTF-8 encoding for dictionary files ( #41 )

        """

        if isinstance(f, str):

            with open(f, 'r') as fd:

            try:

                with open(f, 'r', encoding='utf-8') as fd:

                    return Dictionary.load(fd)

            except:

                raise Exception("Incorrect encoding detected in {}, please "

                                "rebuild the dataset".format(f))

        d = Dictionary()

        for line in f.readlines():

    def save(self, f, threshold=3, nwords=-1):

        """Stores dictionary into a text file"""

        if isinstance(f, str):

            with open(f, 'w') as fd:

            with open(f, 'w', encoding='utf-8') as fd:

                return self.save(fd, threshold, nwords)

        cnt = 0

        for i, t in enumerate(zip(self.symbols, self.count)):