Dockerfile updated due to expired ros-key

just a rename

Gradient layer plugin added

Delete Dockerfile_drone

Delete tmux.conf

Delete .gitignore

file cleaning and comment added to cpp

A* minor adjust and navigation parameters changes

Inizializzazione repo, rover simulation and planner plugin examples

other files clean

build fix and files clean

new rover simulation branch!

simulation sensors rate downed

rover mesh changed and sensors positions adjust

Updated Dockerfile: gz version back to standard Fortress