Log Message:
Updated devel/rubigen to 1.5.4.

1.5.4
- mocha, cucumber and shoulda are development dependencies (fixes
  requirement for thoughtbot-shoulda too)

1.5.3
- Forced rubigen to use activesupport 2.3.5 (as the last < 3.0
  version). It will upgrade to use 3.0.0 when it is released.

1.5.2
- Trying to remove a circular rubigen->newgem->rubigen dependency issue

1.5.1
- Return #write_manifest which was accidently removed
- Moved website into gh-pages branch

1.5.0
- Preparation for integration back into Rails
- --git/-g option for generated files to be added via git commands
- after_generate hook for generators (used as rails' templates mechanism)
- bumped activesupport requirement to 2.2.2
- upgraded internal files to support latest newgem (removed config/
  folder, moved config to Rakefile)
- support for RAILS_ROOT as a destination root
- removed references to Merb which now has its own generator system;
  can access any merb generators via 'rubigen' helper app
- RubiGen::Base.active can be changed to a RubiGen::Base subclass that will
  be used for lookups (e.g. RubiGen::Base.active = Rails::Generator::Base)

1.4.0
- rubigen tests now pass against ruby 1.9.0 and ruby 1.9.1(prerelease 2)
- puts are sent to an explicit #stdout which can be STDOUT or a StringIO
  passed from tests; test output is now clean!