Set 'with_front' to False for all Taxonomies

We had already send a submission to set 'with_front' to false for the main slug, but we need to have it set for all the taxonomies as well. For many sites we setup the url permalinks to be /blog/%postname%/. This makes it easy for clients as all posts go into the blog. 

This pull request fixes the issues of /blog/ appearing in any of the listings urls. However I noticed they don't have /listings in the url. We need to update all the taxonomy slugs. We should pull the listings slug option and display that before the taxonomy:

get_option( 'wp_listings_slug' );

If we add this the default for status as an example would be '/listings/status/', unless the option is changed.