Optimize redrawing, define keys separately

Source/Keys.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#define		KeyEsc			SDLK_ESCAPE
+
+#define		KeyDebug		SDLK_F3
+#define		KeyGenFlatMap	SDLK_F6
+#define		KeyGenNoiseMap	SDLK_F7
+
+#define		KeyUp			SDLK_UP
+#define		KeyDown			SDLK_DOWN
+#define		KeyLeft			SDLK_LEFT
+#define		KeyRight		SDLK_RIGHT
+
+#define		KeyAbove		SDLK_LSHIFT
+#define		KeyBelow		SDLK_LCTRL
+
+#define		KeyPlace		SDLK_z
+#define		KeyBreak		SDLK_x