Download Refactor (#483)

# Added
- New: Cards when processing a download shows a spinner for the progress of the download

# Changed
- Changed: Downloads now always take the backend filename and are streamed in a more optimal manner, reducing the javascript processing that was needed previously.
==================================

* Started refactor of downloader to be more UX friendly and much faster.

* Completed refactor of Volume download to use a new mechanism. Downloads are streamed over and filename used exclusively from header. Backend has additional DB calls to get the Series Name information to make filenames nice.

* download service has been updated so all download functions use new event based observable. Duplicates code for downloading, but much cleaner and faster.

* Small code cleanup

UI/Web/src/app/shared/shared.module.ts

@@ -18,7 +18,9 @@ import { ShowIfScrollbarDirective } from './show-if-scrollbar.directive';
 import { A11yClickDirective } from './a11y-click.directive';
 import { SeriesFormatComponent } from './series-format/series-format.component';
 import { UpdateNotificationModalComponent } from './update-notification/update-notification-modal.component';
-
+import { SAVER, getSaver } from './_providers/saver.provider';
+import { CircularLoaderComponent } from './circular-loader/circular-loader.component';
+import { NgCircleProgressModule } from 'ng-circle-progress';
 
 @NgModule({
   declarations: [
@@ -35,7 +37,8 @@ import { UpdateNotificationModalComponent } from './update-notification/update-n
     ShowIfScrollbarDirective,
     A11yClickDirective,
     SeriesFormatComponent,
-    UpdateNotificationModalComponent
+    UpdateNotificationModalComponent,
+    CircularLoaderComponent
   ],
   imports: [
     CommonModule,
@@ -46,7 +49,8 @@ import { UpdateNotificationModalComponent } from './update-notification/update-n
     NgbTooltipModule,
     NgbCollapseModule,
     LazyLoadImageModule,
-    NgbPaginationModule // CardDetailLayoutComponent
+    NgbPaginationModule, // CardDetailLayoutComponent
+    NgCircleProgressModule.forRoot()
   ],
   exports: [
     RegisterMemberComponent,
@@ -59,7 +63,8 @@ import { UpdateNotificationModalComponent } from './update-notification/update-n
     CardDetailLayoutComponent,
     ShowIfScrollbarDirective,
     A11yClickDirective,
-    SeriesFormatComponent
-  ]
+    SeriesFormatComponent,
+  ],
+  providers: [{provide: SAVER, useFactory: getSaver}]
 })
 export class SharedModule { }