selected row highlight (#1448)

* showing selected row

Support for showing selected row for the components:

- DataTable
- DocumentList
- Activiti TaskList
- Activiti ProcessList

fixes #170

* unit test fixes

ng2-components/ng2-alfresco-datatable/src/data/datatable-adapter.ts

@@ -16,6 +16,7 @@
  */
 
 export interface DataTableAdapter {
+    selectedRow: DataRow;
     getRows(): Array<DataRow>;
     setRows(rows: Array<DataRow>): void;
     getColumns(): Array<DataColumn>;

ng2-components/ng2-alfresco-datatable/src/data/object-datatable-adapter.ts

@@ -26,6 +26,8 @@ export class ObjectDataTableAdapter implements DataTableAdapter {
     private _rows: DataRow[];
     private _columns: DataColumn[];
 
+    selectedRow: DataRow;
+
     static generateSchema(data: any[]) {
         let schema = [];