Merge pull request #43 from Jackreichert/master

Adds Category (and tag) Mapping
Partial Addition of Custom Taxonomies

Still incomplete. The problematic file is
includes/class-syndication-wp-rss-client.php the else condition in line
274. It should work currently if “category” or “tag” is selected, but
not yet with custom taxonomies. I’m trying to work out the syntax for
that.