Update jQuery to 1.8.2

Add readme with link to demo page.

Update paths for moved javascript files.

Move demo to root so gh-pages can use the same layout as the main project.

For IE9 support, exclude bgiframe, exclude excanvas, and add shadow support.

Update to jQuery 1.6.1. Have to use .prop instead of .attr, this makes us depend on jQuery 1.6+ as .prop was introduced in 1.6. This breaks the animation demos.

Initial commit.