Bundle update 2013-09-04

`konacha` で[travis](https://travis-ci.org/fastladder/fastladder/jobs/10007813)と似たエラーがruby1.9.3-p429で一度出た(以降出なかった)
```text
  Failed:  config_spec.js.coffee
    Error: Failed to load config_spec.js.coffee.
Perhaps it failed to compile? Check the rake output for errors.

  Failed:  ldr_spec.js.coffee
    Error: Failed to load ldr_spec.js.coffee.
Perhaps it failed to compile? Check the rake output for errors.
```

似たエラーは
https://github.com/jfirebaugh/konacha/issues/123
https://github.com/sstephenson/sprockets/pull/441
https://github.com/jfirebaugh/konacha/issues/146
capybara (from 1.1 to 2.1) and poltergeist (from 1.0.3 to 1.3.0)で解決してる人もいるようなので、poltergeist(1.3.0 to 1.4.0)を含む bundle updateを実施してみた