Add legal boilerplate and LICENSE file

src/app/header/header.component.html

@@ -1,3 +1,6 @@
+<!-- Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+     All Rights Reserved. See LICENSE file for details.     -->
+
 <div class="tfw-grid-navbar tao-grid-center-center">
   <img src="images/avatao_logo.svg" routerLink="/" class="tao-grid-center-left tfw-company-logo" alt="">
   <span class="tfw-header-title">Tutorials</span>

src/app/header/header.component.scss

@@ -1,3 +1,6 @@
+// Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+// All Rights Reserved. See LICENSE file for details.
+
 @import "../../assets/scss/variables.scss";
 
 .tfw-header-title {

src/app/header/header.component.ts

@@ -1,3 +1,6 @@
+// Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+// All Rights Reserved. See LICENSE file for details.
+
 import { Component } from '@angular/core';
 
 @Component({