Parses content of the config file.

        In child class overload and call super to set flag
        ``allow_no_values`` and allow keys with no value in
        config file::

            def parse_content(self, content):
                super(YourClass, self).parse_content(content,
                                                     allow_no_values=True)

def parse_content(self, content, allow_no_value=False):
        """Parses content of the config file.

        In child class overload and call super to set flag
        ``allow_no_values`` and allow keys with no value in
        config file::

            def parse_content(self, content):
                super(YourClass, self).parse_content(content,
                                                     allow_no_values=True)
        """
        super(IniConfigFile, self).parse_content(content)
        config = RawConfigParser(allow_no_value=allow_no_value)
        fp = io.StringIO(u"\n".join(content))
        config.readfp(fp, filename=self.file_name)
        self.data = config