create ColorUtils class
modify factory method name
fix sample
Merge pull request #24 from nohana/feature/suitable_factory_method_name

modify factory method name
Merge pull request #25 from nohana/feature/color_utils_class

create ColorUtils class
create Caladbolg2 class
add caladbolg2 sample
change Class Name

- Caladbolg2 => Caliburn