revise conditional statement for commonjs;

current conditional statement allows the else statemtent to execute even if the first if statement is true in certain race confitions;

Author: jpalomar

jquery.timeago.js

@@ -18,7 +18,7 @@
   if (typeof define === 'function' && define.amd) {
     // AMD. Register as an anonymous module.
     define(['jquery'], factory);
-  } if (typeof module === 'object' && typeof module.exports === 'object') {
+  } else if (typeof module === 'object' && typeof module.exports === 'object') {
     factory(require('jquery'));
   } else {
     // Browser globals