Automatically get the room name
Merge branch 'feature_room_name'
Show from user name
Merge branch 'feature_from_user_name'
Removed ChatworkTo::Message
Merge branch 'remove_message'
Implemented rich formatted message and auto link
Merge branch 'decorate_slack_message'
Changed api incoming-webhook to API(chat.postMessage)
Merge branch 'change_api'
Updated gemspec
Merge branch 'update_gemspec'
Appended README
Merge branch 'update_readme'
Fixed dependency
Merge branch 'fix_rspec'