lobby_menu.cpp builds, as does all of client/menu_scenes

This is great progress, but I think I should turn the common directory into a subnmodule, since
I've been constantly tabbing back and forward between this folder, and the debug folder, making
and committing identical edits to both.

 Scene list:
        > disconnected_screen.*pp
        > lobby_menu.*pp
        > main_menu.*pp
        > options_menu.*pp
        > splash_screen.*pp
        * world*.*pp

        * unfinished
        > building

common/graphics/image.hpp

@@ -39,7 +39,7 @@ public:
 	Image& operator=(Image&&);
 
 	SDL_Texture* Load(SDL_Renderer* renderer, std::string fname);
-	SDL_Texture* Create(SDL_Renderer* renderer, Uint16 w, Uint16 h);
+	SDL_Texture* Create(SDL_Renderer* renderer, Uint16 w, Uint16 h, SDL_Color blank = {0, 0, 0, 255});
 	SDL_Texture* CopyTexture(SDL_Renderer* renderer, SDL_Texture* ptr);
 	SDL_Texture* SetTexture(SDL_Texture*);
 	SDL_Texture* GetTexture() const;