Feature: Lazy loading

Lazy loaded everything
TODO: The cash flow module when clicking on sub-links, it reloads the whole page, it needs to be diagnosed and fixed, this problem also exists in the other modules
TODO: Rename folders and modules such as account to accounts to match the url

overlord/src/app/ledger/ledger.component.ts

@@ -9,9 +9,9 @@ import {debounceTime, distinctUntilChanged, map, startWith, switchMap} from 'rxj
 import * as moment from 'moment';
 import {LedgerDataSource} from './ledger-datasource';
 import {Ledger} from './ledger';
-import {Account} from '../account/account';
+import {Account} from '../core/account';
 import {LedgerService} from './ledger.service';
-import {AccountService} from '../account/account.service';
+import {AccountService} from '../core/account.service';
 import {ToCsvService} from '../shared/to-csv.service';
 
 @Component({
@@ -117,7 +117,7 @@ export class LedgerComponent implements OnInit, AfterViewInit {
 
   show() {
     const info = this.getInfo();
-    this.router.navigate(['Ledger', info.account.id], {
+    this.router.navigate(['ledger', info.account.id], {
       queryParams: {
         startDate: info.startDate,
         finishDate: info.finishDate