bug fixes + jquery extend instead of clone methods

[eroh92]

Fixed a bug where some versions of request change the callback method of toQueue.

Changed cloneAndExtend to be jQuery.extend.

Updated jQuery to use npm version rather than hard coded version.

[jhurliman]

What is the status on this?

[jhurliman]

By the way, jQuery.extend and cloneAndExtend have different semantics, and commit f4101f9 appears to break node-crawler. From the jQuery docs:

"Keep in mind that the target object (first argument) will be modified, and will also be returned from $.extend(). If, however, we want to preserve both of the original objects, we can do so by passing an empty object as the target:

var object = $.extend({}, object1, object2);"

This patch causes the queue() function to continually overwrite the properties in this.options, causing erratic behavior.