UMD-ified js file so can work as is outaide of Node

src/js/crossword_parser.js

@@ -1,3 +1,16 @@
+// Using UMD (Universal Module Definition), see https://github.com/umdjs/umd, and Jake,
+// for a js file to be included as-is in Node code and in browser code.
+(function (root, factory) {
+  if (typeof module === 'object' && module.exports) {
+    // Node. Does not work with strict CommonJS, but
+    // only CommonJS-like environments that support module.exports,
+    // like Node.
+    module.exports = factory();
+  } else {
+    // Browser globals (root is window)
+    root.CrosswordDSL = factory();
+  }
+}(this, function () {
   // given the DSL, ensure we have all the relevant pieces,
   // and assume there will be subsequent checking to ensure they are valid
   function parseDSL(text){
@@ -489,7 +502,8 @@
     return jsonText;
   }
 
-  module.exports = {
+  return {
     'whateverItIs' : parseWhateverItIs,
     'intoSpecJson' : parseWhateverItIsIntoSpecJson
   };
+}));