extra DOM events for DataTable (#1723)

* extra DOM events for DataTable

- support for ‘row-click’ DOM event (bubbling)
- support for ‘row-dblclick’ DOM event (bubbling)
- DataRowEvent exposes ‘sender’ property to simplify access to
component from within handlers
- readme and test updates

* fix unit tests

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

@@ -56,10 +56,13 @@ export class DataSorting {
 
 export class DataRowEvent extends BaseUIEvent<DataRow> {
 
-    constructor(value: DataRow, domEvent: Event) {
+    sender: any;
+
+    constructor(value: DataRow, domEvent: Event, sender?: any) {
         super();
         this.value = value;
         this.event = domEvent;
+        this.sender = sender;
     }
 
 }