IO object fails with method GET

URL params are undefined is using GET method.

Fix:

if(this.options.method.toLowerCase() == 'get') {

// url += (url.indexOf('?') >= 0) ? '&' : '?' + params;
// bug fix by deanoj. params are undefined.
url += (url.indexOf('?') >= 0) ? '&' : '?' + base.toQueryString(this.options.params);

}