feat: add app shell (angular-material)

Add app shell built using angular-material and flex-layout. Refractor
code due to configuration changes.

Fixes #52

src/app/self-service/self-service-routing.module.ts

@@ -1,16 +1,28 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
-import { Route, extract } from '../../app/core';
+import { Route, extract } from '../core';
 import { UserManagementComponent } from './user-management/user-management.component';
 import { CreateUserComponent } from './create-user/create-user.component';
 import { ViewUserComponent } from './view-user/view-user.component';
 
 const routes: Routes = [
   Route.withShell([
-    { path: 'self-service/users', component: UserManagementComponent, data: { title: extract('Self Service') } },
-    { path: 'self-service/users/create', component: CreateUserComponent },
-    { path: 'self-service/users/view', component: ViewUserComponent }
+    {
+      path: 'self-service/users',
+      component: UserManagementComponent,
+      data: { title: extract('Self Service Users') }
+    },
+    {
+      path: 'self-service/users/create',
+      component: CreateUserComponent,
+      data: { title: extract('Create Self Service User') }
+    },
+    {
+      path: 'self-service/users/view',
+      component: ViewUserComponent,
+      data: { title: extract('View Self Service User') }
+    }
   ])
 ];