Greatly reduced module imports hierarchy

- it is no longer needed manually importing numerous modules as
CoreModule re-exports them

ng2-components/ng2-alfresco-viewer/index.ts

@@ -25,9 +25,7 @@
  */
 
 import { NgModule, ModuleWithProviders } from '@angular/core';
-import { HttpModule } from '@angular/http';
-import { CommonModule } from '@angular/common';
-import { TranslateModule } from 'ng2-translate/ng2-translate';
+import { CoreModule } from 'ng2-alfresco-core';
 
 import { ViewerComponent } from './src/componets/viewer.component';
 import { RenderingQueueServices } from './src/services/rendering-queue.services';
@@ -57,9 +55,7 @@ export const VIEWER_PROVIDERS: any[] = [
 
 @NgModule({
     imports: [
-        CommonModule,
-        HttpModule,
-        TranslateModule
+        CoreModule
     ],
     declarations: [
         ...VIEWER_DIRECTIVES