JavaScript Boilerplate - Review comments required
Interesting work Arif. I really loved to see different as well as interesting JS patterns you have used. It is looking to me like, it is going in a good and right direction. 

Few things that you might consider to do is

I) Create some example of different modules and ensure they are in different files (it is not very clear with the current example but I assume you have already thought about it).

II) Might be a very personal choice, I don’t like _ in variable and method names. The way I know what is public and what is private is by looking at what is being returned at the bottom, as I use a pattern like below in most occasions 

    (function(MODULE, $)  {
       MODULE.charting = function(options) {
          options = $.extend({
              defaultParam1: “a”,
              defaultParam2: “b”
          }, options);

          var xAxis, yAxis;

          function render() {

          }

          function destroy() {

          } 

          (function init() {
             //Anything that is suppose to be called when a object of the
             //module is created. Acts like a psuedo constructor.
          })();

          return {
             render: render,
             destroy: destroy
          };
       };
     }(MODULE || {}, jQuery));


What do you think? In above example you can clearly see what is public and they can be exposed with a different name if one wants. So in refactoring it will not break other components as the way it is exposed outside can be different. If you see what I mean.

III) If you are using jQuery, you can use extend like above to define defaults and then override if passed by the user.

IV) Generally I don’t tend to put URLs in JavaScript and prefer to put them on jsp, asp, json response, etc. as then front-end doesn’t need to worry about context/domain/port.

Will send you more comments if I think of any. For the time being have a think about it and let me know your views. Also keep on sharing the progress, would love to see this growing into a very fruitful thing.