add members link
weibo for short is better
Merge pull request #135 from happypeter/weibo

weibo for short is better
URL: url.com/username #137
reverved words for user signup fix #140
new message
downgrade jquery-fileupload-rails to fix #138
BDD the signup form #146
new favicon
add cool
fetch from gravatar.com #143
video uploder by upyun #150
only the user can edit his own profile #153
now filename is hashed #150
Merge branch 'video_upload'
users can upload their own avatar #158
local avatar>gravatar>default avatar #158
modify course intro style
Merge branch 'avatar_upload'
finally, we can submit video on edit_course_path #161