Collection of structures & TMAlign

[gezmi]

Code of Conduct

Description

Two new features were added to the pacakge:

• possibility of making collections of pandaspdb objects, and perform actions on all of them
• added an Align class, and implemented TMAlign (or its newer version, USalign).

Pull Request Checklist

• Added a note about the modification or contribution to the ./docs/sources/CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./biopandas/*/tests directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under biopandas/docs/sources/ (if applicable)
• Ran PYTHONPATH='.' pytest ./biopandas -sv and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., PYTHONPATH='.' pytest ./biopandas/classifier/tests/test_stacking_cv_classifier.py -sv)
• [y] Checked for style issues by running flake8 ./biopandas