Online-judge-tools

- [54](https://github.com/kmyk/online-judge-tools/issues/54) [#60](https://github.com/kmyk/online-judge-tools/issues/60) stop using selenium to `submit` to TopCoder MM
- [138](https://github.com/kmyk/online-judge-tools/issues/138) improve the error message of `login` for AtCoder

- [130](https://github.com/kmyk/online-judge-tools/issues/130) make `--rstrip` by default of `test`
- [131](https://github.com/kmyk/online-judge-tools/issues/131) add `--print-input` option to `test`

- [59](https://github.com/kmyk/online-judge-tools/issues/59) add `code-statistics` command
- [118](https://github.com/kmyk/online-judge-tools/issues/118) remove `login` feature for yukicoder
- [116](https://github.com/kmyk/online-judge-tools/issues/116) ignore backup files at `test`
- [112](https://github.com/kmyk/online-judge-tools/issues/112) suppress wrong warnings of `download`
- [117](https://github.com/kmyk/online-judge-tools/issues/117) use beta.atcoder.jp for `--open` of `submit`