Added road gen, Ians UI/checkpoints and various misc items + bug fixes

Added a road that auto generates along nodes and interpolates in between using path creator package on the unity webpage. AI should be fairly easy to implement into this due to the ability to traverse this path (might be able to use it for placements as well). Always starts at (x,z)->(0,0) to allow for a start/finish line to be added along with multiple laps to be added later. some variation already occurs but I will be adding a random number generator eventually to further add randomness to the track. Track needs to be populated with obstacles, walls, ect still. Ians UI has been merged and all bugs found have been patched with the exception of the effects not playing for the speed boost. Marco will need to merge the AI with this eventually