This adds HTML, CSS, and JS to FancyCaptcha output to refresh the image,
which requests it via a new fancycaptchareload API.
It also cleans up the Asirra class a little.
Bug: 14230
Change-Id: I4e476f32de199534c9798fc78e8490b3ef91dd45
* Removed unused globals and local variables.
* Use Message class.
* Remove PHP4-ism from recaptchalib.php.
* Remove superfluous newlines.
* Add missing semi-colon in ext.confirmedit.asirra.js.
* Fix up some documentation.
Change-Id: I8916003d083a8c00aeabc9e485cc9a50030f0982