apply decreaseIndent for ruby code

extensions/ruby/package.json

 {
 	"name": "ruby",
-	"version": "0.1.0",
+	"version": "0.2.0",
 	"publisher": "vscode",
 	"engines": { "vscode": "*" },
+	"activationEvents": ["onLanguage:ruby"],
+	"main": "./out/rubyMain",
 	"contributes": {
 		"languages": [{
 			"id": "ruby",
@@ -17,5 +19,9 @@
 			"scopeName": "source.ruby",
 			"path": "./syntaxes/Ruby.plist"
 		}]
+	},
+	"scripts": {
+		"compile": "gulp compile-extension:ruby",
+		"watch": "gulp watch-extension:ruby"
 	}
 }

extensions/ruby/src/rubyMain.ts

+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+import { ExtensionContext, languages } from 'vscode';
+
+export function activate(context: ExtensionContext): any {
+	languages.setLanguageConfiguration('ruby', {
+		indentationRules: {
+			increaseIndentPattern: /^\s*((begin|class|def|else|elsif|ensure|for|if|module|rescue|unless|until|when|while)|(.*\sdo\b))\b[^\{;]*$/,
+			decreaseIndentPattern: /^\s*([}\]]([,)]?\s*(#|$)|\.[a-zA-Z_]\w*\b)|(end|rescue|ensure|else|elsif|when)\b)/
+		},
+		wordPattern: /(-?\d+(?:\.\d+))|(:?[A-Za-z][^-`~@#%^&()=+[{}|;:'",<>/.*\]\s\\!?]*[!?]?)/
+	});
+}

extensions/ruby/src/typings/ref.d.ts

+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+/// <reference path='../../../../src/vs/vscode.d.ts'/>
+/// <reference path='../../../../src/typings/mocha.d.ts'/>
+/// <reference path='../../../../extensions/node.d.ts'/>
+/// <reference path='../../../../extensions/lib.core.d.ts'/>
+/// <reference path='../../../../extensions/declares.d.ts'/>
\ No newline at end of file

extensions/ruby/tsconfig.json

+{
+	"compilerOptions": {
+		"module": "commonjs",
+		"target": "es5",
+		"outDir": "./out",
+		"noLib": true,
+		"sourceMap": true
+	},
+	"exclude": [
+		"node_modules"
+	]
+}
\ No newline at end of file