Accessing examples broken by new GitHub X Frame Options

On January 13, 2016, GitHub suddenly set X-Frame-Options to DENY in the HTTP headers of GitHub Pages.

This breaks all GitHub pages that are embedded in iframes, including (at least) the examples galleries for SceneJS, xeoEngine and THREE.js.

Therefore, we need to redesign those examples browsers so that they don't rely on iframes. Until then, for SceneJS and xeoEngine, you'll need to access the example pages directly.

For example, to access the SceneJS Spherical Billboards demo, instead of going to:

http://scenejs.org/examples.html#billboards_spherical

go to this link instead:

http://scenejs.org/examples/billboards_spherical.html

Note that you need to replace the '#' with '**' and add '.html**' to the end of the URL.