Merge branch 'main' into release-0.2.1

Author: yuta-nakahara

README.md

@@ -123,6 +123,8 @@ The following packages are currently available. In this library, a probabilistic
 * [Hidden Markov normal model](https://yuta-nakahara.github.io/BayesML/bayesml.hiddenmarkovnormal.html "BayesML Hidden Markov Normal Model")
 * [Context tree model](https://yuta-nakahara.github.io/BayesML/bayesml.contexttree.html "BayesML Context Tree Model")
 
+In the future, we will add packages to deal with more complicated hierarchical models.
+
 ## How to contribute
 
 Thank you for considering a contribution to BayesML. For more information, please see [here](./CONTRIBUTING.md).

README_jp.md

@@ -120,6 +120,8 @@ print(learn_model.estimate_params(loss='0-1'))
 * [隠れマルコフモデル](https://yuta-nakahara.github.io/BayesML/bayesml.hiddenmarkovnormal.html "BayesML Hidden Markov Normal Model")
 * [文脈木モデル](https://yuta-nakahara.github.io/BayesML/bayesml.contexttree.html "BayesML Context Tree Model")
 
+また，今後はより複雑な階層的モデルを取り扱うパッケージを追加していく予定です．
+
 ## コントリビューションの方法
 
 BayesMLへのコントリビューションを考えてくださってありがとうございます．詳細については[こちら](./CONTRIBUTING_jp.md)をご覧ください．