+ Fixed ray tracing with LOD feature
     + Added Level Of Detail on the bodies
        * Changing vertex depth depending on camera, and clamping to [0,7]
     - Issue, ray traycing bug, fix in next commit
        * no issues when ray tracing is turned off (default)
     + Added first draft on atmosphere
        * Using a outer sphere with size depending on camera position
        * Using the solar coverage buffer to hide atmosphere behind bodies
        * Needed function in body to obtain vertices and indices since the same vertices are used for the atmosphere
     - Hardcoded color to fit earth, and atmosphere height