More visuals (multiple roads + intersection support) and LOADING PRESETS!

I had to refactor a bunch of my code to use stuff allocated on the heap because I, stupidly, decided to initialize a bunch of my objects on the stack in a loop, causing a lot of the pointers to become hanging. Oh well, now I just have to make sure to remember to delete the allocated objects.

Some plain and dirty presets can be loaded and the textures look pretty bad, but it will look a lot better pretty soon. I’m going to work on adding the first player interaction: allowing the player to add a road by clicking twice. I expect this might be a bit hard and school’s starting so it will probably be a while before I post another devlog (depending on how hard it is for me to add it)

I also might try to get the road offsets and intersections better so it is more playable.