Added check for IE 10- input's onchange handler so upload isn't triggered in case of dropped file (which doesn't populate the input).

Avoids confusion of many people (http://proger.i-forge.net/FileDrop_-_cross-browser_JavaScript_Drag-Drop_file_upload/7CC?page=1#comment27 and others).
Commented upload.php.
Removed SRWare Iron version references.