Added 'undefined' check on VERSION otherwise unbundled usage from npm fails

package.json

@@ -25,24 +25,25 @@
   },
   "devDependencies": {
     "chai": "3.5.0",
+    "gzip-size": "3.0.0",
+    "in-publish": "2.0.0",
     "karma": "0.13.22",
     "karma-chai": "0.1.0",
+    "karma-chrome-launcher": "1.0.1",
     "karma-mocha": "1.0.1",
     "karma-mocha-reporter": "2.0.4",
-    "karma-chrome-launcher": "1.0.1",
     "karma-phantomjs-launcher": "0.2.1",
     "karma-phantomjs-shim": "1.1.2",
+    "karma-sinon": "1.0.5",
     "karma-sourcemap-loader": "0.3.7",
     "karma-webpack": "1.7.0",
-    "karma-sinon": "1.0.5",
     "mocha": "2.5.3",
     "phantomjs": "1.9.18",
-    "sinon": "1.17.4",
-    "webpack": "1.13.1",
-    "gzip-size": "3.0.0",
-    "in-publish": "2.0.0",
     "pretty-bytes": "3.0.1",
-    "readline-sync": "1.4.4"
+    "readline-sync": "1.4.4",
+    "semver-compare": "^1.0.0",
+    "sinon": "1.17.4",
+    "webpack": "1.13.1"
   },
   "dependencies": {
     "Base64": "1.0.0",

src/__tests__/LDClient-test.js

@@ -1,4 +1,5 @@
 var LDClient = require('../index');
+var semverCompare = require('semver-compare');
 
 describe('LDClient', function() {
   var xhr;
@@ -45,6 +46,18 @@ describe('LDClient', function() {
       var settingsRequest = requests[0];
       expect(/sdk\/eval/.test(settingsRequest.url)).to.be.false;
     });
+
+    it('should contain package version', function () {
+      // Arrange
+      var version = LDClient.version;
+
+      // Act: all client bundles above 1.0.7 should contain package version
+      // https://github.com/substack/semver-compare
+      var result = semverCompare(version, '1.0.6');
+
+      // Assert
+      expect(result).to.equal(1);
+    });
   });
 
 });

src/index.js

@@ -282,6 +282,9 @@ function initialize(env, user, options) {
 }
 
 module.exports = {
-  initialize: initialize,
-  version: VERSION
+  initialize: initialize
 };
+
+if(typeof VERSION !== 'undefined') {
+  module.exports.version = VERSION;
+}