Initial commit with a functionnql visitor pattern.
Visitor pattern sources group together in visitor.rb (module VisitorPattern)
File visitor.rb renamed as visitor_pattern.rb
visitor_for method added (+ auto extend)
.gitignore added
visitor_pattern commented plus minor changes
Mini Rakefile added
Cleaning
Comments removed
Major changes in the project (name changed into Design Wizard :o).
Minor changes in the code.

Sorry for the crappy commit.
Color added for run:rspec
Visitor pattern specs reworked
Design Wizard is licensed under MIT License
Gemspec updated