2014/11/21-17:07

->Changes:
1.Glitch solved:Pictures captured now have the right rotation.
2.Function completed: The pictures now can be listed in the gridview,
 and removed by the top-right button.
3.Class added: MyArrayAdapter: customized ArrayAdapter to be bound to 
the gridview.
4.Minor changes & annotations: Description omitted.

->TO-DO:
1.Optimize the picture capturing & showing performance.

---Luck