Add similarity within trajectories

navipy/trajectories/similarity/__init__.py

navipy/trajectories/similarity/dtw/__init__.py

navipy/trajectories/similarity/dtw/multi.py

navipy/trajectories/similarity/dtw/test_multi.py

navipy/trajectories/similarity/frechet/LICENSE

navipy/trajectories/similarity/frechet/__init__.py

navipy/trajectories/similarity/frechet/multi.py

navipy/trajectories/similarity/frechet/test.py

navipy/trajectories/similarity/frechet/test_multi.py

navipy/trajectories/similarity/test_pairwise_comp.py

navipy/trajectories/similarity/tools/__init__.py

navipy/trajectories/similarity/tools/test_dict_from_list.py

navipy/trajectories/similarity/tools/test_get_all_pairs.py

navipy/trajectories/similarity/tools/test_make_df.py

navipy/trajectories/similarity/twed/__init__.py

navipy/trajectories/similarity/twed/multi.py

navipy/trajectories/similarity/twed/test.py

navipy/trajectories/similarity/twed/test_multi.py