Log Message:
Update devel/rubigen to 1.3.1.  Changes from version 1.2.4 include:

* Fixed the require statements in generated tests for rails/merb generators
* Rails::Generator::Base is a valid generator superclass
* Rails generators have alternate template (based on standard NamedBase)
* test helpers define RAILS_ROOT for rails generators
* component_generator: specific subclasses for rails + merb generators,
  not the generic RubiGen::Base