Cache redesign part 1, and add support for alternative links

src/app/statistics/statistics.module.ts

@@ -4,6 +4,14 @@ import { CoreModule } from '../core/core.module';
 import { SharedModule } from '../shared/shared.module';
 import { ViewTrackerComponent } from './angulartics/dspace/view-tracker.component';
 import { StatisticsService } from './statistics.service';
+import { StatisticsEndpoint } from './statistics-endpoint.model';
+
+/**
+ * Declaration needed to make sure all decorator functions are called in time
+ */
+export const models = [
+  StatisticsEndpoint
+];
 
 @NgModule({
   imports: [