Update docs
fix #123 changed html5lab page links
fix #122 create login page link and button
fix #128 created announcement space
translated the news text
delete <BR>
窪田さんGridシステムを攻略
Merge pull request #130 from nttcom-webcore/yusuke_ds_release

WIP #122  #123 #126 #128
change maintenance mode
add disabled to submit buttons
Merge pull request #131 from nttcom-webcore/yusuke_ds_release

メンテナンス中モードに入ります。
released dashboard
rename old pages
update docs
Merge pull request #132 from nttcom-webcore/yusuke_ds_release

Yusuke ds release
update docs