make sure a parent module is defined first

lib/jasmine/headless.rb

@@ -1,6 +1,7 @@
 require 'pathname'
 
-module Jasmine::Headless
+module Jasmine
+  module Headless
     autoload :CommandLine, 'jasmine/headless/command_line'
 
     autoload :CoffeeScriptCache, 'jasmine/headless/coffee_script_cache'
@@ -30,6 +31,7 @@ module Jasmine::Headless
       end
     end
   end
+end
 
 require 'jasmine/headless/errors'