Merged Gmap.
Attempting to add LuaInterface for std::vector, failed.
Enhanced RayTest, for interaction.
Fixed a memory issue in Pathfinding_init() (occurred when the map is not square), though I dunno whether it is actually fixed. Maybe I should refer to project_Urd.
Refined code, WIP nearest node function find_nearest_node() (I do not want to implement it with Physics). comp_GraphNodeStore and Helpers.coord_distance().
Finished path extraction. Added input handler.