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/material.module.ts

@@ -0,0 +1,47 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { NgModule } from '@angular/core';
+import {
+    MdButtonModule,
+    MdCardModule,
+    MdDialogModule,
+    MdIconModule,
+    MdMenuModule,
+    MdProgressBarModule,
+    MdProgressSpinnerModule,
+    MdTooltipModule
+} from '@angular/material';
+
+export function modules() {
+    return [
+        MdButtonModule,
+        MdCardModule,
+        MdDialogModule,
+        MdIconModule,
+        MdMenuModule,
+        MdProgressBarModule,
+        MdProgressSpinnerModule,
+        MdTooltipModule
+    ];
+}
+
+@NgModule({
+    imports: modules(),
+    exports: modules()
+})
+export class MaterialModule {}