made jquery cdn and mozilla issuer.js protocol agnostic to work over htt...

There was an issue over SSL that caused the jquery cdn as well as the mozilla issuer.js cdn to be blocked.  My small fix just makes those resources protocol agnostic to allow to be served over http and https.

Addresses issue #152

Also, addressing issue #118 , I've refactored the hyperlink with the nested div to style the button on user profile using onclick inside of a <button> tag.

Although, it might be handy to create a js file to handle ui events like click events for things like this, and it would allow in the future to do more fancy things in the ui...

something like: 
````
function Tahrir() {
    this.init();
}

Tahrir.prototype = {
         
        init: function() {
             this.initStyling();
            this.initEvents();
       },
        initStyling: function() {
          // some styling, if needed - like jqueryui
            $('button').button();
        },
        initEvents: function() {
                 $('.user_profile').on('click', 'button.exportToBackpack', function() {
                       claim_badges();
                 });
         }
        
};
// dom ready
$(function() {
    var tahrir = new Tahrir();
});
````
Just a general suggestion; I'm really stoked about this project and you all are doing some awesome stuff!