[Rock-dev] Place for the robot model and simulation scenes in the bundle

[Sylvain Joyeux]

> for the robot models
> <bundle_root>robot_name/model/ (e.g. asguard/*.smurf)
In SDF, and as far as I understand in SMURF as well, one would
"compose" models together. I.e. if I have a SDF model for an arm, I
would just import it in another SDF file. Where would we put "common
models" under that scheme ?

> for the gazebo world / mars scenes
> <bundle_root>simulation/scenes
I'm warming up to the 'simulation' folder, actually.

Sylvain