[ADF-3103] Added new inputs & columns Task List Demo - Rebase (#3659)

* Added columns, inputs and error message alert

* Add basic documentation

* [ADF-3101] Trailing whitespaces removed

demo-shell/src/app/components/task-list-demo/task-list-demo.component.ts

@@ -15,23 +15,6 @@
  * limitations under the License.
  */
 
-/*!
- * @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
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * distributed under the License is distributed on an "AS IS" BASIS,
- * limitations under the License.
- */
-
 import { Component, OnInit } from '@angular/core';
 import { FormGroup, FormBuilder, Validators, FormControl, AbstractControl } from '@angular/forms';
 import { ActivatedRoute, Params } from '@angular/router';