Merge pull request #4 from Takashi-U/master

各種変更
Merge pull request #5 from Takashi-U/master

Edit sidebar
Merge pull request #6 from Takashi-U/master

Delete news.html
Merge pull request #7 from Takashi-U/master

Fix and add news
Merge pull request #8 from Takashi-U/master

Add news