update description

python/setup.py

python/tffpy/create_subregions.py

python/tffpy/datasets.py

python/tffpy/experiments/exp_solve_tff.py

python/tffpy/experiments/tests/test_exp_solve_tff.py

python/tffpy/interpolation_solver.py

python/tffpy/scripts/script_exp_solve_tff.py

python/tffpy/tests/ci_config.py

python/tffpy/tests/test_create_subregions.py

python/tffpy/tests/test_datasets.py

python/tffpy/tests/test_interpolation_solver.py

python/tffpy/tests/test_tf_fading.py

python/tffpy/tests/test_utils.py

python/tffpy/tf_fading.py

python/tffpy/tf_tools.py

python/tffpy/utils.py