Clean code for MVP Release

src/data/shaders.h

@@ -65,8 +65,7 @@ const char * fs =
 
 	"	float diffuse = max(dot(Normal, lightDir),0.0); "
 
-	"	float ambient = 0.5;"
-	"	FragColor = (ambient + diffuse)*color;"
+	"	FragColor = (0.5 + 0.5*diffuse)*color;"
 	"}";