Bump src/etcd, src/inigo, src/nsync, src/warden-linux

Bump coreos/etcd:
  Jonathan Boulle:
     Merge pull request #854 from brianredbeard/moarthings ( Travis Unknown )
  Brian 'Redbeard' Harrington:
     docs(libraries-and-tools.md) Add vulcan proxy and kubernetes ( Travis Unknown )
Bump cloudfoundry-incubator/inigo:
  Alex Suraci:
     switch to ifrit nsync listener runner
Bump cloudfoundry-incubator/nsync:
  Alex Suraci:
     ?bulk_token -> ?token
     introduce bulk processor and listener
  Onsi Fakhouri:
     bump runtime-schema, use new Nsync BBS and fake
Bump cloudfoundry-incubator/warden-linux:
  Alex Suraci:
     '=' -> ': '