Merge pull request '根据需求返回fork list 中的user mail' (#88) from KingChan/forgeplus:chenjing into standalone_develop

app/views/forks/fork_list.json.jbuilder

@@ -3,6 +3,7 @@ json.user do
   json.type @user.type
   json.name @user.real_name
   json.login @user.login
+  json.mail @user.mail
   json.image_url url_to_avatar(@user)
   json.forked Project.exists?(user_id: @user.id, forked_from_project_id: @project.id)
 end