Fix #91: Account for refs on top level

Author: bhch

src/form.js

@@ -36,6 +36,11 @@ export default class ReactJSONForm extends React.Component {
         let schema = this.props.editorState.getSchema();
         let formGroups = [];
 
+        if (schema.hasOwnProperty('$ref')) {
+            schema = {...this.getRef(schema['$ref']), ...schema};
+            delete schema['$ref'];
+        }
+
         let type = getSchemaType(schema);
 
         let args = {

src/schemaValidation.js

@@ -19,6 +19,8 @@ export function validateSchema(schema) {
             validation = validateOneOf(schema);
         } else if (schema.hasOwnProperty('anyOf')) {
             validation = validateAnyOf(schema);
+        } else if (schema.hasOwnProperty('$ref')) {
+            validation = {isValid: true};
         } else {
             validation = {
                 isValid: false,