add requireJS support

src/md2.js

@@ -7,13 +7,21 @@
  * Licensed under the MIT license:
  * http://www.opensource.org/licenses/MIT
  */
-;(function(root, undefined) {
+;
+(function (root, undefined) {
 	'use strict';
 
 	var NODE_JS = typeof(module) != 'undefined';
 	if (NODE_JS) {
 		root = global;
 	}
+
+	// Note that for maximum portability, libraries that are not jQuery should
+	// declare themselves as anonymous modules, and avoid setting a global if an
+	// AMD loader is present. jQuery is a special case. For more information, see
+	// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
+
+
 	var HEX_CHARS = '0123456789abcdef'.split('');
 
 	var S = [0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
@@ -56,14 +64,17 @@
 				code = message.charCodeAt(index);
 				if (code < 0x80) {
 					M[i++] = code;
-        } else if (code < 0x800) {
+				}
+				else if (code < 0x800) {
 					M[i++] = 0xc0 | (code >> 6);
 					M[i++] = 0x80 | (code & 0x3f);
-        } else if (code < 0xd800 || code >= 0xe000) {
+				}
+				else if (code < 0xd800 || code >= 0xe000) {
 					M[i++] = 0xe0 | (code >> 12);
 					M[i++] = 0x80 | ((code >> 6) & 0x3f);
 					M[i++] = 0x80 | (code & 0x3f);
-        } else {
+				}
+				else {
 					code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
 					M[i++] = 0xf0 | (code >> 18);
 					M[i++] = 0x80 | ((code >> 12) & 0x3f);
@@ -142,7 +153,13 @@
 
 	if (!root.JS_MD2_TEST && NODE_JS) {
 		module.exports = md2;
+	}
+	else if (typeof define === "function" && define.amd) {
+		define("md2", [], function () {
+			return md2;
+		});
 	} else if (root) {
 		root.md2 = md2;
 	}
+
 }(this));