Fixes: Updated version to 0.0.3 and added size column to bucket listing output

@alisnic: Bumping the Gemfile.lock version up one to match the deployed gem and a small improvement to the bucket listing view to include size.
Yeah, I did this as a quick way to get the number formatted.

The gem is already an indirect dependency: "nyny" -> "actionpack" -> "activesupport".

If you don't want it as a direct dependency, I get it and I'll just grab a regex that does something similar. Up to you -- just let me know what you prefer.