Update river shapefile + update several comments + add few lines to block canal seine nord at bigining of the simulation

Fisrt batch created inits the network + add some lines if I want to init less LSPs + link them with the correct provider according to attractiveness

Create a new scenario to automatically block some roads at steps 500 and 1000 (useful to generate videos)

Add an experiment just to block roads and print the name of blocked one (usefull to create scenarios)