added clojure support

refs:
https://github.com/Microsoft/monaco-editor/issues/828
https://github.com/theia-ide/theia/issues/1717

src/clojure/clojure.contribution.ts

@@ -0,0 +1,18 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 { registerLanguage } from '../_.contribution';
+
+// Allow for running under nodejs/requirejs in tests
+const _monaco: typeof monaco =
+    typeof monaco === 'undefined' ? (<any>self).monaco : monaco;
+
+registerLanguage({
+    id: 'clojure',
+    extensions: ['.clj', '.clojure'],
+    aliases: ['clojure', 'Clojure'],
+    loader: () => _monaco.Promise.wrap(import('./clojure')),
+});