Fix code indentation in README
Fix for querystring being incorrectly appended if querystring already exists, and handle null response from server
…o quickly), and correctly append X-Progress-ID with ampersand when there's already a querystring.
…he upload server is not the same as the web server Signed-off-by: Piotr Sarnacki <email@example.com>
…ng images for all browsers
…tion for safari
Safari can't send ajax requests while submitting form, so we must create hidden iframe and send ajax requests from inside of it.