Merge pull request #420 from Jeffiy/master

add a style for password input

notebook/templates/login.html

@@ -21,7 +21,7 @@
           <div class="center-nav">
             <p class="navbar-text nav">Password:</p>
             <form action="{{base_url}}login?next={{next}}" method="post" class="navbar-form pull-left">
-              <input type="password" name="password" id="password_input">
+              <input type="password" name="password" id="password_input" class="form-control">
               <button type="submit" id="login_submit">Log in</button>
             </form>
           </div>