Add a script to automate generation of vscode dts for DefinitelyTyped.

scripts/generate-vscode-dts.sh

+#!/bin/bash
+
+if [ $# -eq 0 ]; then
+	echo "Pass in a version like ./scripts/generate-vscode-dts.sh 1.30"
+	echo "Failed to generate index.d.ts"
+	exit 1
+fi
+
+header="// Type definitions for Visual Studio Code ${1}
+// Project: https://github.com/microsoft/vscode
+// Definitions by: Visual Studio Code Team, Microsoft <https://github.com/Microsoft>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License.
+ *  See https://github.com/Microsoft/vscode/blob/master/LICENSE.txt for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+/**
+ * Type Definition for Visual Studio Code ${1} Extension API
+ * See https://code.visualstudio.com/api for more information
+ */"
+
+if [ -f ./src/vs/vscode.d.ts ]; then
+	echo "$header" > index.d.ts
+	sed "1,4d" ./src/vs/vscode.d.ts >> index.d.ts
+	echo "Generated index.d.ts for version ${1}."
+else
+	echo "Can't find ./src/vs/vscode.d.ts. Run this script at vscode root."
+fi
\ No newline at end of file