several changes are made. ...

1. shortcut key 'c' is added. when you press 'c' key all the graphs
   will toggle its appearance show or hide.
2. associate tempchart's legend-marker with humidchart's legend-marker.
   now if you click temp marker(and toggling graph), humid graph is
   changed with it. and vice verse.
3. waitboard is added

add JMA data to temperature and humidity