Allow button label to be added via staticTitle input (#1566)

* Allow button label to be added via staticTitle input

Refs #1551

* Minor fix to JSDoc

ng2-components/ng2-alfresco-upload/src/components/upload-button.component.ts

@@ -43,7 +43,7 @@ const ERROR_FOLDER_ALREADY_EXIST = 409;
  * @InputParam {boolean} [false] versioning - true to indicate that a major version should be created
  * @Output - onSuccess - The event is emitted when the file is uploaded
  *
- * @returns {UploadDragAreaComponent} .
+ * @returns {UploadButtonComponent} .
  */
 @Component({
     selector: 'alfresco-upload-button',
@@ -70,6 +70,9 @@ export class UploadButtonComponent {
     @Input()
     acceptedFilesType: string = '*';
 
+    @Input()
+    staticTitle: string;
+
     @Input()
     currentFolderPath: string = '/';