fix tsc viewer

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

@@ -36,7 +36,7 @@ export class NotSupportedFormat {
     /**
      * Download file opening it in a new window
      */
-    private download() {
+    download() {
         window.open(this.urlFile);
     }
 }

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

@@ -244,9 +244,9 @@ export class PdfViewerComponent {
     @HostListener('document:keydown', ['$event'])
     handleKeyboardEvent(event: KeyboardEvent) {
         let key = event.keyCode;
-        if (key === 39) { //right arrow
+        if (key === 39) {  // right arrow
             this.nextPage();
-        } else if (key === 37) {//left arrow
+        } else if (key === 37) { // left arrow
             this.previousPage();
         }
     }

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

@@ -151,7 +151,7 @@ export class ViewerComponent {
      *
      * @returns {boolean}
      */
-    private supportedExtension() {
+    supportedExtension() {
         return this.isImage() || this.isPdf();
     }
 
@@ -162,7 +162,7 @@ export class ViewerComponent {
     @HostListener('document:keydown', ['$event'])
     handleKeyboardEvent(event: KeyboardEvent) {
         let key = event.keyCode;
-        if (key === 27) { //esc
+        if (key === 27) { // esc
             this.close();
         }
     }