proposition of modifications for installation and tutorial 1

The main modifications are relative to the figures. With this request you are able to see what I saw on the screen when doing the tutorial. Notably:
- without the raster I see one yellow square, no points, is it normal ?
- I don't see any traits available for the agents. Did I miss something ?

Finally I think it would be interesting to say how does the second parameter of registerDynamicRaster works. I was not able to guess how a value of 1 was leading to the results being stored in results.h