publish likes to Foursquare/Swarm

[tantek]

If I post a "like" of a Foursquare/Swarm checkin (with a u-like-of link to Foursquare/Swarm checkin permalink), it would be great if I could call Bridgy Publish to POSSE that like to my account on Foursquare/Swarm.

[snarfed]

if anyone's interested in tackling this, i've written up comprehensive instructions on how to add a new silo to bridgy. feel free to jump in!