see commit 2d81aec3b2509d56c1f3d99df3ad94a0d15d7e7d

    see http://querbalken.net/howto-activate-feeding-for-pelican-blog-en.html

    Extended Pelican theme bootstrap

For  firefox dynamic-bookmark the metadata were only aware of FEED_ALL_ATOM and FEED_ALL_RSS, but the docs  http://docs.getpelican.com/en/latest/settings.html also name FEED_ATOM and FEED_RSS. So I added awareness for them.

Since the Theme did not show any menu-link for the feeds, I did NOT add them.