bump(dev-db/etcd): Update to include v1 API fix

Includes a few other changes which are either bug fixes or doc updates:

    Brandon Philips (4):
          bump(README): increase the version of the README to 0.3.0
          fix(README): move contact closer to contributing
          feat(scripts): use zip for windows and darwin
          fix(server/v1): don't fail put on new v1 key

    Brian Waldon (3):
          doc(CompareAndDelete): Add missing CAD docs
          doc(CompareAndSwap): clarify prevIndex in CAS
          chore(gofmt): gofmt compare_and_delete_command.go

    Jan-Erik Rediger (1):
          Change token example to use returned value only

    Michael Marineau (1):
          add(server/v1/tests): Port many of the v2 HTTP handler tests to v1

    TANABE Ken-ichi (2):
          fix(mod/lock): Use dedicated channel to shutdown goroutine properly
          fix(mod/lock): Use CreatedIndex in the first node to watch