Wiki uses sekizai to control js/css on a per page basis

[vkurup]

This is inconsistent with the rest of the project, which might make it difficult to properly minify/compress/rationalize JS/CSS use throughout the project. I would be nice to remove the use of sekizai in the wiki, and replace it with regular extra_css/extra_js blocks which would then get compressed by django-compressor.

Should be addressed in a later phase of the project.