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GitHub User: postmodern
You might also want to look at using Ore (http://github.com/ruby-ore/ore#readme) which stores all project information in a single YAML file, inferring the rest.
Unlike Jeweler, Ore does not regenerate any files or make commits for you. Unlike Hoe, Ore does not need to keep a Manifest and does not add itself as a development dependency. Ore works fine with Bundler and can even be used with Jeweler::Tasks.