如果用户的邮箱不公开，那么在API里返回空字符串
Update auto-space.
改进内容排版, 修正预览样式与实际不同的问题;
Escape title in social share button, fixed #192
Use jasmine-rails HEAD for Rails 4
Mount jasmine-rails
Migrate jasmine config for jasmine-rails
Run spec:javascript instead of jasmine:ci in travis
Update JavaScript test related documentation
Merge pull request #194 from doitian/change-jasmine-to-jasmine-rails

Change jasmine to jasmine rails
Merge pull request #193 from doitian/escape-title-in-social-share-button

Escape title in social share button, fixed #192
disable gif in avatar.
回帖里面单行内容高度不够的问题修正;
密码无法修改的问题修正; #197 #189
Merge pull request #186 from zhangyuan/private_user_email

如果用户的邮箱不公开，那么在API里返回空字符串
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Merge branch 'master' of github.com:ruby-china/ruby-china
add a code list hint in markdown
Finish Block of codes helper
Add block of code for Topic and Wiki page