add a page and css for promption when the ie version is under 8
chang the html and css for ie which version is lower than 8
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
Tiny refactor for the about page.
Move the tests from home to site controller.
Merge pull request #18 from twers/11_improve_the_style_of_attachment_comments

主要是comments的优化
#3 add login fail message
#2 Make the lessonplan cover save with a preview version
Change login integration test. Remove email display after login fail.
Merge pull request #21 from soloara/refactor

#2 #3 complete
delete one line code of javascript in the application.hmal
Merge pull request #17 from twers/5_promption_of_ie

5 promption of ie
change open class to new class. Qiu