dont reference build script etcd has removed it
Merge pull request #46 from ranjib/build_fix

(chore) Fix travis build
Merge pull request #43 from jumanjiman/deps

add missing gem dependencies
enable to run on ruby 1.8.7 (el6)

* Force ruby 1.8.7 hashrocket style via...

  ```
  bundle exec rubocop --only='Style/HashSyntax' -a
  ```

* Handle difference in net/http codebase between 1.8 and 1.9+

* Exclude rubocop and coco in bundle on ruby 1.8.7;
  avoids pulling in deps like celluloid and rainbow.
  (Treat ruby 1.8.7 as a runtime env; not devenv.)