Merge pull request #7 from koshuang/master

new
Merge pull request #11 from koshuang/master

新留言在上面
Merge pull request #16 from koshuang/master

new feature
Merge branch 'gh-pages' of https://github.com/koshuang/Guestbook into gh-pages
Merge pull request #18 from koshuang/master

New date format
Merge pull request #19 from koshuang/gh-pages

修正UI及處理訊息的方法