V. 1.3.0

Time for another update.

Changelog

- Added LOD support, being defined per road. You can choose how many lod levels you want, the distance they render at and the amount of vertices that the have (vertex count/selected value) and lod levels will automatically be generated and setup.
- Added lod values for all road presets
- Redid the curve bending algorithmen so it looks good regardless of how big the object is and how steep the curve is (See picture)
- Changed default value of terrain extra max height to 1
- General fixes with terrain modification
- Smaller bug fixes