Bumps version to 1.4.0 for release

- Adds functionality to apply an elastic_ip durning bootstrap
- Adds functionality to apply knife commands for a specified
  chef_username durning bootstrap
- Tweaked some of the code styling to adhere to common Ruby styling
  conventions
- Updated .gitignore
Merge pull request #7 from willdrew/master

Bumps version to 1.4.0 for release