Unable to access mkdocs metadata

Hello,
I really like this theme, but I found a major issue for me: the [mkdocs metadata](http://www.mkdocs.org/user-guide/custom-themes/#pagemeta) are not accessible for pages except for the main page.

Start by reading the linked MkDocs custom themes documentation and comparing how metadata is exposed on the main page versus other pages in this theme. Confirm the behavior across a non-main page; done means MkDocs page metadata is accessible consistently throughout the theme.

Written by the indexing model from the issue text.