document-list improvements (#1169)

* #1167 document-list improvements

- allow setting custom root path
- document-list module now re-exports datatable module (no need
importing it separately if document-list is already used)
- documentation updates and fixes

* readme updates and unit test

ng2-components/ng2-alfresco-documentlist/demo/src/main.ts

@@ -19,7 +19,6 @@ import { NgModule, Component, OnInit, ViewChild } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';
 import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
 import { CoreModule } from 'ng2-alfresco-core';
-import { DataTableModule }  from 'ng2-alfresco-datatable';
 import { DocumentListModule, DocumentList } from 'ng2-alfresco-documentlist';
 
 import {
@@ -217,7 +216,6 @@ class DocumentListDemo implements OnInit {
     imports: [
         BrowserModule,
         CoreModule.forRoot(),
-        DataTableModule,
         DocumentListModule.forRoot()
     ],
     declarations: [ DocumentListDemo ],