Merge pull request #272 from UnifiedPost/feature/rubygem_include_version

Add the version of the gem to the provides

lib/fpm/package/gem.rb

@@ -136,7 +136,7 @@ def load_package_info(gem_path)
 
       # By default, we'll usually automatically provide this, but in the case that we are
       # composing multiple packages, it's best to explicitly include it in the provides list.
-      self.provides << "#{self.name}"
+      self.provides << "#{self.name} = #{self.version}"
 
       spec.runtime_dependencies.map do |dep|
         # rubygems 1.3.5 doesn't have 'Gem::Dependency#requirement'