[ADF-924] Upload Component enhancements (#2115)

* changed logic/design

* restored dialog component spec

* revert changes

* update upload dialog documentation

* public over private

* component close method

ng2-components/ng2-alfresco-upload/src/services/file-uploading.service.ts

@@ -0,0 +1,30 @@
+/*!
+ * @license
+ * Copyright 2016 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 { Injectable } from '@angular/core';
+import { Observable } from 'rxjs/Observable';
+import { Subject } from 'rxjs/Rx';
+
+@Injectable()
+export class FileUploadService {
+    public remove = new Subject<string>();
+    public onRemoveFile = this.remove.asObservable();
+
+    emitFileRemoved(item: any) {
+        this.remove.next(item);
+    }
+}