update doc.

gist.vim.vimup

@@ -2,7 +2,7 @@ script_name: Gist.vim
 script_id: '2423'
 script_type: utility
 script_package: gist-vim.zip
-script_version: '6.7'
+script_version: '6.8'
 required_vim_version: '7.0'
 summary: vimscript for gist
 
@@ -36,11 +36,11 @@ detailed_description: |
 
     :Gist -d
       delete the gist. (should be work on gist buffer)
-      password authentication is needed.
+      authentication required.
 
     :Gist -f
       fork the gist. (should be work on gist buffer)
-      password authentication is needed.
+      authentication required.
 
     :Gist XXXXX
       get gist XXXXX.
@@ -98,20 +98,12 @@ install_details: |
     plugin/gist.vim
     cookies/github
 
-  if you want to uninstall gist.vim, you have better to remove 'cookies/github'.
-
-  for using gist.vim, you should install git. or set g:github_user and g:github_token into your vimrc.
-  note that g:github_token is NOT a your password.
-
-  how get your token.
-    1. login to github.
-    2. click "Account Settings"
-    3. click "Account Admin"
-    4. you'll see it at following of 'API Token'.
-
   See also: https://github.com/mattn/gist-vim/blob/master/README.mkd
 
 versions:
+- '6.8': |
+   This is an upgrade for Gist.vim: changed authentication. removed password authentication. if you want to keep using password authentication, let gist_use_password_in_gitconfig to 1.
+
 - '6.7': |
    This is an upgrade for Gist.vim: fix behavior of g:gist_browser_command = ':OpenBrowser %URL%'.