Change python library to sissopp

src/CMakeLists.txt

src/python/__init__.py

src/python/classification/svm.py

src/python/postprocess/__init__.py

src/python/postprocess/check_cv_convergence.py

src/python/postprocess/plotting/__init__.py

src/python/postprocess/utils.py

src/python/sensitivity_analysis/__init__.py

tests/exec_test/check_model.py

tests/exec_test/classification/check_model.py

tests/pytest/test_classification/test_classification.py

...s/pytest/test_descriptor_identifier/test_log_regressor.py

tests/pytest/test_descriptor_identifier/test_model.py

tests/pytest/test_descriptor_identifier/test_regressor.py

...ature_creation/test_feat_generation/test_abs_diff_node.py

...st_feature_creation/test_feat_generation/test_abs_node.py

...st_feature_creation/test_feat_generation/test_add_node.py

...est_feature_creation/test_feat_generation/test_cb_node.py

...t_feature_creation/test_feat_generation/test_cbrt_node.py

...st_feature_creation/test_feat_generation/test_cos_node.py