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/clients/clients.module.ts

@@ -1,30 +1,28 @@
 import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
 import { CommonModule } from '@angular/common';
+
 import { ArchwizardModule } from 'angular-archwizard';
 
+import { ClientsRoutingModule } from './clients-routing.module';
 import { ClientsComponent } from './clients.component';
 import { CreateClientComponent} from './create-client/create-client.component';
-import { ClientsRoutingModule } from './clients-routing.module';
-import { CoreModule } from '../core/core.module';
 import { ViewClientComponent } from './view-client/view-client.component';
 import { ViewLoanComponent } from './view-loan/view-loan.component';
 
 @NgModule({
   imports: [
-    CoreModule,
     CommonModule,
     ClientsRoutingModule,
     ArchwizardModule
   ],
   declarations: [
-  ClientsComponent,
-  CreateClientComponent,
-  ViewClientComponent,
+    ClientsComponent,
+    CreateClientComponent,
+    ViewClientComponent,
     ViewLoanComponent
-],
- schemas: [
-  CUSTOM_ELEMENTS_SCHEMA
-],
-
+  ],
+  schemas: [
+    CUSTOM_ELEMENTS_SCHEMA
+  ]
 })
 export class ClientsModule { }