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/text_line.hpp

@@ -33,7 +33,7 @@ public:
 	TextLine();
 	TextLine(SDL_Renderer* r, TTF_Font* f, std::string s, SDL_Color c)
 		{ SetText(r, f, s, c); }
-	~TextLine();
+	virtual ~TextLine();
 
 	void DrawTo(SDL_Renderer*, int posX, int posY);