Updating readme
Update gorouter

$ git shortlog 16c3ecd2..1678894e
David Sabeti and Pieter Noordhuis (5):
      Refactor registry operations
      Rename registerMessage -> registryMessage
      Combine lookup logic in registry
      Remove obsoleted code
      Update github.com/rcrowley/go-metrics

Change-Id: I83fa56a48d8c8e9b2fc22b37eebc553154187e25
Update gorouter

$ git shortlog 1678894e..ca032b7d
Pieter Noordhuis and Tim Labeeuw (2):
      Extract ListMap data structure from registry
      Ignore registration messages without uris

Change-Id: I1b91c9b1b57913c466f3455f0770e881802c480f
Update gorouter submodule and job

The gorouter start script no longer writes out the PID file. This is done by
the gorouter itself to prevent monit from thinking it is started when it is
not.

$ git shortlog ca032b7d..34cd7912
Pieter Noordhuis and Tim Labeeuw (4):
      Add pidfile field to configuration struct
      Add PID file helper function
      Write PID file when the router starts serving requests
      Start listening after giving the registry time to fill up

Change-Id: I994dee57f76bde28b09fe8f698d4d901a7772fdf