Move gemspec line to end of Gemfile.

Geocoder should be required after other things like Rails and Mongoid.

Gemfile

 source "http://rubygems.org"
 
-gemspec
-
 group :development, :test do
   gem 'rake'
   gem 'mongoid'
@@ -13,3 +11,5 @@ group :development, :test do
   	gem 'jruby-openssl'
   end
 end
+
+gemspec