I added sitemap generation and sanitized the category index

[ghost]

Sitemap generation

I added a few templates and updated o-blog.el to automatically generate a sitemap.

Further sanitizing efforts for categories

The recent category-safe change helped for posts, but left an unsanitized directory containing the index. This could be problematic and leads to validation problems if there are spaces, so I moved the index.html file to the sanitized directory and updates the templates accordingly.

[renard]

please split your patch into atomic changes.

Please do also use a different branch than master for your patch submission otherwise you will get a splitheaded repository.

Thanks

[ghost]

Sorry about that. I will fix and re-submit.