Fixes #2: Directly nested arrays not rendrered properly.

Author: bhch

src/form.js

@@ -125,12 +125,12 @@ export default class Form extends React.Component {
                 if (coords.length) {
                     addDataUsingCoords(coords, data[coord], value);
                 } else {
-                    if (Array.isArray(data)) {
-                        data.push(value);
+                    if (Array.isArray(data[coord])) {
+                        data[coord].push(value);
                     }
                     else {
-                        if (Array.isArray(data[coord])) {
-                            data[coord].push(value);
+                        if (Array.isArray(data)) {
+                            data.push(value);
                         } else {
                             data[coord] = value;
                         }