move adf-extensions lib to the ADF repo (#3781)

* adf-extensions lib

* remove console.log calls

* integrate with angular.json

* fix output path

* update scripts

* Add extensions to scripts

* update travis setup

* Travis step II.

lib/extensions/src/lib/config/extension.config.ts

@@ -0,0 +1,35 @@
+/*!
+ * @license
+ * Copyright 2016 - 2018 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { RouteRef } from './routing.extensions';
+import { RuleRef } from './rule.extensions';
+import { ActionRef } from './action.extensions';
+
+export interface ExtensionConfig {
+    $name: string;
+    $version: string;
+    $description?: string;
+    $references?: Array<string>;
+
+    rules?: Array<RuleRef>;
+    routes?: Array<RouteRef>;
+    actions?: Array<ActionRef>;
+
+    features?: {
+        [key: string]: any;
+    };
+}