Add files in lib/geocoder to gemspec.

rails-geocoder.gemspec

@@ -10,7 +10,7 @@ Gem::Specification.new do |s|
   s.summary     = "Simple, database-agnostic geocoding and distance calculations for Rails."
   s.description = "Geocoder adds object geocoding and distance calculations to ActiveRecord models. It does not rely on proprietary database functions so finding geocoded objects in a given area is easily done using out-of-the-box MySQL, PostgreSQL, or SQLite."
 
-  s.files         = Dir.glob("{lib,test}/*") + %w(CHANGELOG.rdoc Rakefile README.rdoc LICENSE)
+  s.files         = Dir.glob("{lib,lib/geocoder,test}/*") + %w(CHANGELOG.rdoc Rakefile README.rdoc LICENSE)
   s.require_paths = ["lib"]
 end