initial commit
init rspec
add hello.rb, hello_spec.rb for initialize test
add rake command
add README
Add message_filter.rb
1st iteration spec refactoring point
end of 1st iteration
refactor spec with using shared_examples
refactor "detect?" method
impliments ng_words before refactor
haveマッチャーでitsメソッドを使った例
haveマッチャとコレクションメソッドを使う方法
Merge remote-tracking branch 'origin/master'

Conflicts:
    README.md