Uses the latest version of Rails by default

* This will require bumping this version periodically, but leaving the
  version has caused hanging of the `bundle` command for some folks

Gemfile

@@ -46,7 +46,7 @@ when /3-1-stable/
 when /3-2-stable/
   gem "rails", :git => "git://github.com/rails/rails.git", :branch => "3-2-stable"
 when nil, false, ""
-  gem "rails"
+  gem "rails", "3.2.9"
 else
   gem "rails", version
 end