Fixes issues that caused IE7/8 to fail

Reported https://github.com/visionmedia/node-querystring/issues/103

For some reason the else block __test/parse.js__ and __test/stringify.js__ are causing IE 7/8 to fail.
https://github.com/visionmedia/node-querystring/blob/master/test/parse.js#L3
https://github.com/visionmedia/node-querystring/blob/master/test/stringify.js#L4

To confirm the changes in the src are working property you will need to comment out the following within the else block of each of the previously mentioned file.

```javascript
var qs = require('../')
    , expect = require('expect.js');
```