Fixes callback handlers not being passed the correct context.

jquery-ondemand-context.diff

Index: javascript/core/jquery.ondemand.js
===================================================================
--- javascript/core/jquery.ondemand.js	(revision 115901)
+++ javascript/core/jquery.ondemand.js	(working copy)
@@ -150,12 +150,15 @@
 
 		// This replaces the usual ajax success & complete handlers.  They are called after any on demand JS is loaded.
 		var _ondemandComplete = function(xml, status) {
-			var status = $.httpSuccess(xml) ? 'success' : 'error';
+			var status  = $.httpSuccess(xml) ? 'success' : 'error';
+			var context = s && s.context || $;
+
 			if(status == 'success') {
 				var data = jQuery.httpData(xml, _dataType);
-				if(_success) _success(data, status);
+				if(_success) _success.call(context, data, status);
 			}
-			if(_complete) _complete(xml, status);
+
+			if(_complete) _complete.call(context, xml, status);
 		}
 	    
 		// We remove the success handler and take care of calling it outselves within _ondemandComplete