Update JSFiddles/how-to to support the new registration format.

docs/client-server/howto.rst

@@ -31,7 +31,7 @@ Registration
 The aim of registration is to get a user ID and access token which you will need
 when accessing other APIs::
 
-    curl -XPOST -d '{"user_id":"example", "password":"wordpass"}' "http://localhost:8008/_matrix/client/api/v1/register"
+    curl -XPOST -d '{"user":"example", "password":"wordpass", "type":"m.login.password"}' "http://localhost:8008/_matrix/client/api/v1/register"
 
     {
         "access_token": "QGV4YW1wbGU6bG9jYWxob3N0.AqdSzFmFYrLrTmteXc", 

jsfiddles/example_app/demo.js

@@ -110,7 +110,7 @@ $('.register').live('click', function() {
         url: "http://localhost:8008/_matrix/client/api/v1/register",
         type: "POST",
         contentType: "application/json; charset=utf-8",
-        data: JSON.stringify({ user_id: user, password: password }),
+        data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
         dataType: "json",
         success: function(data) {
             onLoggedIn(data);

jsfiddles/register_login/demo.js

@@ -14,7 +14,7 @@ $('.register').live('click', function() {
         url: "http://localhost:8008/_matrix/client/api/v1/register",
         type: "POST",
         contentType: "application/json; charset=utf-8",
-        data: JSON.stringify({ user_id: user, password: password }),
+        data: JSON.stringify({ user: user, password: password, type: "m.login.password" }),
         dataType: "json",
         success: function(data) {
             showLoggedIn(data);