Updated headers includes with '<>'
Fixed again folders description
Use typedefed native types
Renamed biLinearInterpolation() => biLinearInterpolationSmooth(), because it performs a smooth internally
Used ZN_API macro for future DLL export
Moved main.cpp to src/demo/ because now the workspace is divided in two "projects" (engine and demo)
Fixed GameSettings::assetsRoot not being applied (asset types needed the same manually set root)
Made the root folder of an AssetMap more explicit