Viewer enhancements and Viewer Dialog prototype (#2200)

* viewer dialog scaffold

* toolbar divider component

* simple error screen

* material module and tooltips

* show file name in the title

* improved settings, simple image viewer

* flex-based image viewer, minor fixes

* ability to switch between viewers

* single viewer for images

* remove MDL from the Viewer component

* remove hardcoded demo shell layout

remove harcoded assumptions on "header" and "main" elements

* rework text viewer, remove MDL dependency

* upgrade 'unknown format' view, remove MDL

* simplify media viewer layout

* simplify image viewer

* clean pdf viewer

* migrate pdf viewer styles to scss

* rewrite pdf viewer host styles in scss

* fix unit tests and cleanup layout

* file viewer service

* viewer dialog supports downloads if url provided

ng2-components/ng2-alfresco-viewer/src/components/imgViewer.component.ts

@@ -15,15 +15,15 @@
  * limitations under the License.
  */
 
-/* tslint:disable:component-selector  */
-
-import { Component, Input, OnChanges, SimpleChanges } from '@angular/core';
+import { Component, Input, OnChanges, SimpleChanges, ViewEncapsulation } from '@angular/core';
 import { ContentService } from 'ng2-alfresco-core';
 
 @Component({
-    selector: 'img-viewer',
+    selector: 'adf-img-viewer',
     templateUrl: './imgViewer.component.html',
-    styleUrls: ['./imgViewer.component.css']
+    styleUrls: ['./imgViewer.component.scss'],
+    host: { 'class': 'adf-img-viewer' },
+    encapsulation: ViewEncapsulation.None
 })
 export class ImgViewerComponent implements OnChanges {