Add support to WebGL

[Michael Moroni]

I wanted to try this demo but it doesn't work for me (https://mozillademos.org/demos/remixingreality/demo.html).

Some info:
* http://www.doesmybrowsersupportwebgl.com/
* http://www.khronos.org/webgl/wiki/Getting_a_WebGL_Implementation#Safari

[Martin Robinson (martin-james-robinson-deactivatedaccount)]

This just requires exposing a configuration option. WebKitGTK+ is built with WebGL by default now.

[Cris Dywan (kalikiana)]

Thanks for the patch, Martin. I modified it to use katze_object_has_property and install a property with localization, and default to TRUE if this is a git build. I think enabling this for all git users will increase testers a lot.

[Michael Moroni (airon90)]

Is the patch added to Midori on development? I just updated and doesmybrowsersupportwebgl.com says that Midori doesn't support WebGL yet :S

[Alexander Butenko (avb)]

You need midori built from git + webkit built with --enabled-webgl support to use it.

[Eduard Gotwig (gotwig)]

as of today, not available in elementary Luna Beta1

[Sergey "Shnatsel" Davidoff (shnatsel)]

Eduard, are you sure you have a GPU that supports WebKit's WebGL?