add basic text rendering

src/main.c

@@ -18,7 +18,7 @@ client_poll_event()
 		default:
 			break;
 		}
-	} 
+	}
 }
 
 /**
@@ -31,6 +31,11 @@ client_update_framebuffer()
 {
 	// single green demo pixel
 	game_state->framebuffer[0] = 0x00FF00;
+
+	put_rect(0, 0, 1100, 200, 0xFFFF00);
+	put_string("Hello, traveller. You have come\nto the right place!",
+		20, 20, 2, 2, 3, 0x000000, 0xFFFF00
+	);
 }
 
 int