Standalone examples failures

[MaximilienNaveau]

Dear all,

I am trying to simply run the standalone example to give me an idea of the results and API and I have some comments.
The readme lacks content on installation and run instructions (I am completing and I will do a small PR on this.)

I unsuccessfully ran:

• python sl1m/stand_alone_scenarios/hrp2_complex.py

Exception has occurred: FileNotFoundError
[Errno 2] No such file or directory: '$HOME/devel/workspace_sl1m/install/lib/python3.8/site-packages/sl1m/stand_alone_scenarios/constraints_files/RF_constraints_in_LF_reduced.obj'
  File "$HOME/devel/workspace_sl1m/src/sl1m/sl1m/stand_alone_scenarios/hrp2_complex.py", line 30, in <module>
    pb = Problem(limb_names=limbs, constraint_paths=paths)

• python sl1m/stand_alone_scenarios/hrp2_stairs.py

Exception has occurred: FileNotFoundError
[Errno 2] No such file or directory: '$HOME/devel/workspace_sl1m/install/lib/python3.8/site-packages/sl1m/stand_alone_scenarios/constraints_files/RF_constraints_in_LF_reduced.obj'
  File "$HOME/devel/workspace_sl1m/src/sl1m/sl1m/stand_alone_scenarios/hrp2_stairs.py", line 30, in <module>
    pb = Problem(limb_names=limbs, constraint_paths=paths)

• python sl1m/stand_alone_scenarios/solo_trot.py

Exception has occurred: FileNotFoundError
[Errno 2] No such file or directory: '$HOME/Documents/cloud_laas/Shared/Solo3D//com_inequalities/COM_constraints_in_HRleg_effector_frame.obj'
  File "$HOME/devel/workspace_sl1m/src/sl1m/sl1m/stand_alone_scenarios/solo_trot.py", line 54, in <module>
    pb = Problem(limb_names=limbs, other_names=others, constraint_paths=paths, suffix_com=suffix_com)

• python sl1m/stand_alone_scenarios/talos_ramp.py
  Failure from the solver to find a suitable solution.

I fixed or was able to run all the other successfully.

[MaximilienNaveau]

Pull request associated: #23

[MaximilienNaveau]

The PR has been merge. It remains the examples using HRP-2 which needs proprietary data hence we should remove them.