Squashed commit of the following:

commit f100c6f1983d6ee8b3c41d7b476b9a3ba5ed56e0
Author: Ferdinand Niedermann <ferdinand.niedermann@gmail.com>
Date:   Wed Mar 6 22:52:10 2013 +0100

    add rss feeds and post for gc001 by hand

commit 8042fb53409ea1964ec53e00551e2c6b4cd5d012
Author: Ferdinand Niedermann <ferdinand.niedermann@gmail.com>
Date:   Wed Mar 6 16:08:11 2013 +0100

    shownotes in markdown

commit 4de7d43ce72ae384b6bb79e62ddc641c346fc10c
Author: Ferdinand Niedermann <ferdinand.niedermann@gmail.com>
Date:   Wed Mar 6 15:54:02 2013 +0100

    podcasts metadata

commit 450ead7eb235f56442d7ae0a049af151cf131583
Author: Ferdinand Niedermann <ferdinand.niedermann@gmail.com>
Date:   Mon Mar 4 11:14:32 2013 +0100

    podcast metadata and shownotes