Adding improved navbar and dashboard

src/app/app-routing.module.ts

src/app/card/card.component.css

src/app/dash/dash.component.css

src/app/dash/dash.component.html

src/app/nav/nav.component.css

src/app/nav/nav.component.html

src/app/nav/nav.component.ts

src/assets/images/dokutoolbar.png

src/assets/images/headerimage.png