added simple navigation to switch from images to map view;

added simple images view skeleton;
remove unnecessary websocket support;

frontend/src/app/component/images/images.component.html

@@ -0,0 +1,23 @@
+<h2>Available Images</h2>
+
+<div>
+  <span style="width: 9.5em; display: inline-block; margin-left: 1.5em">Name</span>
+  <span style="width: 15em; display: inline-block">Date</span>
+</div>
+
+<mat-expansion-panel *ngFor="let image of images | slice:paginationGetStart():paginationGetEnd()">
+  <mat-expansion-panel-header (click)="$event.stopPropagation()">
+    <span style="width: 10em"
+    >{{image.name}}</span>
+    <span style="width: 15em"
+    >{{image.datetime}}</span>
+  </mat-expansion-panel-header>
+  TEST
+</mat-expansion-panel>
+
+<mat-paginator [length]="images.length"
+               [pageSize]="pageSizeOptions[0]"
+               [pageSizeOptions]="pageSizeOptions"
+               (page)="lastPageEvent = $event"
+               showFirstLastButtons
+></mat-paginator>