Merge pull request shushutochako#20 from shushutochako/feature/bumpup…

…_version_0.4.0

Bump up version to 0.4.0

Merge pull request shushutochako#18 from shushutochako/feature/bumpup…

…_version_0.3.1

Bump up version to 0.3.1

Merge pull request shushutochako#15 from shushutochako/feature/bumpup…

…_version

Feature/bumpup version

Merge pull request shushutochako#3 from shushutochako/feature/change_…

…options_dynamically

implement process of change options after instantiation

Fix small