Restructured the website repo to allow for future i18n and content tr…

…anslation (#1909)

* Modified configand directory structure for multiple langs.

* Moved docs and images to new i18n directories.

* Redirects are broken in preview. Moved the redirects file into the en/ directory too.

* Move the redirects file back to root.

* Test redirects with en/ prefix.

* Still testing redirects.

* I think redirects are working now.

* Removed Kubeflow customization of page edit URL.

* Moved the logos to same directory as other images.