Gives current time as tuple (t, t_str) where
     t is integer portion from time.time()
     t_str string of t using DEFAULT_TIMEFORMAT

def now (time_t = None, slug = False):
  '''Gives current time as tuple (t, t_str) where
     t is integer portion from time.time()
     t_str string of t using DEFAULT_TIMEFORMAT
  '''
  if not time_t:
    time_t = time ()
  time_s = strftime (
    DEFAULT_SLUGFORMAT if slug else DEFAULT_TIMEFORMAT,
    gmtime (time_t))
  return (int (time_t), time_s)