test pull request. Qiu
Merge pull request #14 from winsonwq/master

Have a try pull request, thanks.
Merge pull request #15 from soloara/refactor

Add comments feature
Merge branch 'master' into refactor
added google analytics script, need binding to gmail later
add Tracking ID of Google Analytics
add tracks for attachments view, add and remove
add tracks for comment add and remove
Merge pull request #16 from twers/8_add_Google_Analytics

8 add google analytics
reuse the comments style of lessonplan for attachment comments
add comments for scratch attachments
display name for anonymous user
create home page controller for about-us page which would be the new homepage. Qiu
wrong typing. Qiu
add integration test for about-us page. Qiu
change h2 to h1. Qiu
style about-us page. Qiu
use default initial-scale. Qiu
add responsive style. Qiu
Merge pull request #19 from twers/10_integrate_about_us_page

10 integrate about us page