Update config.yml

BREAKING CHANGE: To the Transport API. The "method" argument to Trans…

…port.RPC has been changed to an enum from a string.

To update your code, all action strings like "Pickup" become api.Pickup.  "AddPeer" becomes api.AddPeer and so on.

I apologize for the breakage, but I think everyone will agree that this is worth it.  Less strings in the binary and now
you can autocomplete action names in your favorite IDE without typos or guessing.  All known transports have been updated.

Merge pull request #16 from capnspacehook/out-buffer

Fix rapid sending/receiving of messages

Updates to CircleCI config.