provide a register button on login

also direct users from file to login

www/file/main.js

@@ -301,7 +301,12 @@ define([
         }
 
         if (!Cryptpad.isLoggedIn()) {
-            return Cryptpad.alert("You must be logged in to upload files");
+            return Cryptpad.alert(Messages.upload_mustLogin, function () {
+                if (sessionStorage) {
+                    sessionStorage.redirectTo = window.location.href;
+                }
+                window.location.href = '/login/';
+            });
         }
 
         $form.css({

www/login/index.html

@@ -62,6 +62,10 @@
             <input type="text" id="name" name="name" class="form-control" data-localization-placeholder="login_username" autofocus>
             <input type="password" id="password" name="password" class="form-control" data-localization-placeholder="login_password">
             <button class="btn btn-primary login first" data-localization="login_login"></button>
+            <div class="extra">
+                <p data-localization="login_notRegistered"></p>
+                <button id="register" class="btn btn-success register first" data-localization="login_register"></button>
+            </div>
         </div>
     </div>
     </div>

www/login/main.js

@@ -128,5 +128,16 @@ define([
                 }, 0);
             }, 100);
         });
+        $('#register').on('click', function () {
+            if (sessionStorage) {
+                if ($uname.val()) {
+                    sessionStorage.login_user = $uname.val();
+                }
+                if ($passwd.val()) {
+                    sessionStorage.login_pass = $passwd.val();
+                }
+            }
+            window.location.href = '/register/';
+        });
     });
 });