Angular6

Topics included:

1. interpolation, property binding, class binding --> test project 2
2. event binding, 2 way binding, template reference variable --> test project 3
3. ngIf, ngSwitch, ngFor --> test project 4
4. component interaction, pipes --> test project 5
5. services --> test project 6
6. http --> test project 7
7. routing --> test project 8