Merge branch 'feature_multiple_input' into 'master'

README.md

demo/bio_folder/demo_annot.bio

demo/bio_folder/demo_predict.bio

demo/bio_folder/toy_test_annot.bio

demo/bio_folder/toy_test_predict.bio

demo/mapping_file.csv

nerval/evaluate.py

tests/test_folder/test_demo_annot.bio

tests/test_folder/test_demo_predict.bio

tests/test_folder/test_toy_annot.bio

tests/test_folder/test_toy_predict.bio

tests/test_mapping_file.csv

tests/test_run.py