rearranging all lessons

1-Introduction/3-ethics-of-ML/README.md

1-Introduction/3-ethics-of-ML/assignment.md

2-Regression/README.md

2-Tooling/1-tools/README.md

2-Tooling/1-tools/assignment.md

2-Tooling/2-programming/README.md

2-Tooling/2-programming/assignment.md

2-Tooling/3-math/README.md

2-Tooling/3-math/assignment.md

2-Tooling/4-algorithms/README.md

2-Tooling/4-algorithms/assignment.md

3-Classification/README.md

3-Classification/translations/README.es.md

3-Libraries/5-Spark/assignment.md

3-Libraries/6-NLTK/assignment.md

4-Clustering/1-Supervised-1/README.md

4-Clustering/1-Supervised-1/assignment.md

4-Clustering/1-Supervised-1/translations/README.es.md

4-Clustering/2-Supervised-2/README.md

4-Clustering/2-Supervised-2/assignment.md