Allow passing data to GM_xmlhttpRequest callbacks

[PetrToman]

Sometimes it is useful to pass data to ajax callback functions. I suggest adding 'context' option like jQuery.ajax() has - see http://api.jquery.com/jQuery.ajax/

$.ajax({
   url: "test.html",
   context: document.body
}).done(function() {
   $(this).addClass("done");
});

[Y0ba]

Use bind() function.

   url: "test.html"
}).done(function() {
   $(this).addClass("done");
}.bind(document.body));

[PetrToman]

Y0ba: That will do the job. Thanks! 👍

[arantius]

This is a straightforward and backwards-compatible change, so I'd expect to include it.

[arantius]

Test case: https://gist.github.com/arantius/5729861