An empty ruby gem

foo.gemspec

$:.push File.expand_path("../lib", __FILE__)

# Maintain your gem's version:
require "foobar/version"

# Describe your gem and declare its dependencies:
Gem::Specification.new do |s|
  s.name        = "foobar"
  s.version     = Foobar::VERSION
  s.authors     = ["Foo", "Bar"]
  s.email       = ["you@foobar.com"]
  s.homepage    = "http://www.foobar.com"
  s.summary     = "I make FOOBAR"
  s.description = "I make FOOBAR"

  s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]

  s.add_dependency "rails", '~> 3.2'
  s.add_dependency "multi_json"

  s.add_development_dependency 'pry'
  s.add_development_dependency 'rspec'
  s.add_development_dependency 'webmock'

end

foobar.rb

# Path: lib/foobar.rb
require "foobar/version"

module Foobar

  class << self
    attr_accessor :configuration
  end

  def self.configure
    self.configuration ||= Configuration.new
    yield(configuration)
  end

  class Configuration
    attr_accessor :base_uri

    def initialize
      @base_uri = 'http://example.com'
    end
  end
end

Gemfile

source "https://rubygems.org"

# Declare your gem's dependencies in service_qualification.gemspec.
# Bundler will treat runtime dependencies like base dependencies, and
# development dependencies will be added by default to the :development group.
gemspec

# Declare any dependencies that are still in development here instead of in
# your gemspec. These might include edge Rails or gems from your path or
# Git. Remember to move these dependencies to your gemspec before releasing
# your gem to rubygems.org.

# To use debugger
# gem 'debugger'

Rakefile

begin
  require 'bundler/setup'
rescue LoadError
  puts 'You must `gem install bundler` and `bundle install` to run rake tasks'
end

require 'rdoc/task'

RDoc::Task.new(:rdoc) do |rdoc|
  rdoc.rdoc_dir = 'rdoc'
  rdoc.title    = 'foobar'
  rdoc.options << '--line-numbers'
  rdoc.rdoc_files.include('README.rdoc')
  rdoc.rdoc_files.include('lib/**/*.rb')
end

Bundler::GemHelper.install_tasks

version.rb

# Path: lib/foobar/version.rb
module Foobar
  VERSION = "1.0.0"
  API_VERSION = '1'

  API_ACCEPT_HEADER = "application/vnd.foobar.v#{API_VERSION}"
end

Could be a full (public?) repo that you can just clone to get going. Then you wouldn't need to include the "Path" comments - everything would be in the right place already.