update 08/07/2014

- add one </div> in views/content.php
- add function to delete multiple images at one time
- add function to change cover
- change "private" to 只有我
update 08/13/2014

- 最後少掉的</div>發現少在什麼地方，補回來了
- 順便把一些沒用的註解拿掉