Renamed Frame to Quad; added drawq/addq; fixed some bugs.

src/modules/timer/sdl/Timer.cpp

@@ -69,9 +69,10 @@ namespace sdl
 		}
 	}
 
-	void Timer::sleep(unsigned int ms)
+	void Timer::sleep(int ms)
 	{
-		SDL_Delay(ms);
+		if(ms > 0)
+			SDL_Delay(ms);
 	}
 
 	float Timer::getDelta() const

src/modules/timer/sdl/Timer.h

@@ -90,7 +90,7 @@ namespace sdl
 		* usually 1ms.
 		* @param ms The number of milliseconds to sleep for.
 		**/
-		void sleep(unsigned int ms);
+		void sleep(int ms);
 
 		/**
 		* Gets the time between the last two frames, assuming step is called