Add information message to singin view.

src/main/twirl/signin.scala.html

@@ -2,6 +2,12 @@
 @import context._
 @main("Sign in"){
   <div class="signin-form">
+    @settings.information.map { information =>
+      <div class="alert alert-info" style="background-color: white; color: #555; border-color: #4183c4; font-size: small; line-height: 120%;">
+        <button type="button" class="close" data-dismiss="alert">&times;</button>
+        @Html(information)
+      </div>
+    }
     @signinform(settings)
   </div>
 }