refactor one
fix refactor spec
add calc class
refactor cli
fix add optparse
add attr_reader :multiaz
rename @mode_class => @mode
cherry-pick 26da6de68315815bfdf4b2eb97829d8f78025cc3
output change to json
chmod 755 ./bin/rikanjo
update README
add -j (output_json) option
add .hound.yml
merge refactor