anchor.diff:  
   CaμsAPI is an API to promote utility learning assistant on wechat end.
   
  -## Student Register [/students/register]
  +## Student Register [/users/register]
   
   ### A Student Register [POST]
   
  
positive.code:                     "title": "Title",
                      "explanation": "Brief explanation",
                      "updatingtime": "Updating Time",
                      "state": "New file or not",
                      "size": "Size of file",
                      "url": "File url"
                  }
  
negative.code:             "username": "Request username"
          }
  
  ## Student Week Curriculum  [/schedule/{username}/{week}]
  
  ### Get Curriculum Of A Week [POST]
  
  