new_contents: import matplotlib.pyplot as plt
  from aux2mongodb import MagicWeather
  from datetime import date
  
  
  m = MagicWeather(auxdir='/fact/aux')
  
  df = m.read_date(date(2015, 12, 31))
  
  df.plot(x='timestamp', y='humidity', legend=False)
  plt.ylabel('Humidity / %')
  plt.show()
  
subject: Add example for MagicWeather