Brakelights effect, shadow layer and other improvements. - Added customizable brakelights effect. - Added customizable shadow sprite layer. - Added capability to parse relative file paths. - Added new property 'sprite_frame_count', which allows one to specify sprite frame count for all states (instead of a per-state basis). - Allowing multiple def's per subfolder. - Added option to specify course music. - Display kph instead of km/h. - Rounding up dial tachometer max rpm to nearest thousand. - Improved performance of courses drawing, specially ones containing sprites. - WIP course editor state. - Updated fgeal submodule version to 0.7.2 - A lot of refactoring. - Fixed lap info display offset. - Fixed background parallax. - Other fixes.