try reading without throwing an error
        config_dir may be a list of directories to try in order, if so it
        will return after the first successful read
        other args will be passed direction to read()

def try_read(self, config_dir=None, **kwargs):
        """
        try reading without throwing an error
        config_dir may be a list of directories to try in order, if so it
        will return after the first successful read
        other args will be passed direction to read()
        """
        if isinstance(config_dir, basestring):
            config_dir = (config_dir,)

        for cdir in config_dir:
            try:
                self.read(cdir, **kwargs)
                return cdir

            except IOError as e:
                pass