Add support for model view editor (#1442)

* Add proposed API for model view editors

* Initial working model view editor

* Add extension demo

* Revert "Add extension demo"

This reverts commit 10d3b720ad347919dd5668a339da8e96e26b2b82.

* view model editor and add the support for register content

* clean up the code

* fix editor issues where you register more than one content

* formating

* remove unused imports

* addressed comments

* address comments2

* address comment3

src/sql/parts/modelComponents/modelEditor/modelViewInput.ts

@@ -0,0 +1,37 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { TPromise } from 'vs/base/common/winjs.base';
+import { IEditorModel } from 'vs/platform/editor/common/editor';
+import { EditorInput } from 'vs/workbench/common/editor';
+
+export class ModelViewInput extends EditorInput {
+
+	public static ID: string = 'workbench.editorinputs.ModelViewEditorInput';
+
+	constructor(private _title: string, private _modelViewId: string) {
+		super();
+	}
+
+	public get title(): string {
+		return this._title;
+	}
+
+	public get modelViewId(): string {
+		return this._modelViewId;
+	}
+
+	public getTypeId(): string {
+		return 'ModelViewEditorInput';
+	}
+
+	public resolve(refresh?: boolean): TPromise<IEditorModel> {
+		return undefined;
+	}
+
+	public getName(): string {
+		return this._title;
+	}
+}