created update, put data into the database, modified readme

templates/default-layout-wrapper.hamlet

@@ -53,6 +53,7 @@ $newline never
                   <li role="separator" class="divider">
                   <li><a href="@SettingsR">Settings</a-->
             <ul class="nav navbar-nav navbar-right">
+              <li><a href="@{UpdateR}">Update</a>
               <li><a href="@{AuthR LogoutR}">Logout</a>
     <div id="main" role="main">
         ^{pageBody pc}