core/test: replaced local qunit copy with qunit via svn:externals; inlined styles specific to polluted.php; kept testrunner.js with just the noConflict call

jquery ajax: extends #3087. The xhr factory is now an ajax setting called 'xhr' instead of a method (jQuery.getAjaxTransport).

jquery ajax: closes #3087, #2167, #2128. The ajax transport creation process is exposed to allow overriding.

jquery event: closes #3127. jQuery.event.special built-in methods were optimized. The mouse(enter|leave) special case is only added for non-IE browsers.Thanks to Mike Helgeson for his help.

jquery core: closes #2968. Simplified isFunction, dropping support for DOM methods and functions like alert() on IE.

test runner: adding scriptaculous 1.7.0 for the polluted test runner. It fails, but 1.8.x doesn't fail anymore.

jquery fx: closes #3128. Saved some bytes when creating custom animations, using macros. Thanks Mike Helgeson.

core: changed jQuery.css to num (uses curCSS) in the height/width methods with dramatically increases performance for height/width

fx:  1) patch from Ariel removes the need of adding properties like scrollTop and scrollLeft specifically to fx.step - The priority order is style[prop] ? style[prop] : elem[prop], 2) fixed the height/width case - it wasn't possible to animate obj.height/obj.width if there wasn't a style attr.

fx: animate() can now animate any property on a generic object or native wrapper (i.e. window.outerWidth)

jquery ajax: closes #3052. Additional check on httpData() to keep compatibility with older code (form plugin).

jquery ajax: Fixes #3045. The protocol wasn't being checked to see if a script is required for cross domain requests.