Gait generation

Minimal installation for the gait generation in requirements.txt

Generate one gait

TODO gait_generator.py is outdated, and its code is redundant with auto_gait_generator.py.

We need to either factorize the code, or just use auto_gait_generator.py with -n 1.

python3 gait_generator.py -n <name> <--mini> --dx X --dy Y --dt T --length L -o <output_dir>

python3 auto_gait_generator.py -o <output_dir> -n <number> <--mini> --min_dx X --max_dx X --min_dy Y --max_dy Y --min_dt T --max_dt T --length L

python3 replay_amp.py -f <path/.json>