checked the contents of introduction.html page
* added 'UserProfileAdmin' with actions and list_display:
  o actions:
    - 'approve_users',
    - 'sponsor_users',
    - 'cancel_approve_users',
    - 'cancel_sponsor_users',
    - 'reset_approve_users',
    - 'reset_sponsor_users',
  o list_display:
    - 'user',
    - 'realname',
    - 'gender',
    - 'institute',
    - 'identify',
    - 'reason',
    - 'transcript_url',
    - 'supplement',
    - 'attachments',
    - 'is_approved',
    - 'is_sponsored',
* updated zh_CN messages