fixed grid lines

TODO.md

@@ -1,18 +1,10 @@
 - add all other options like size etc
 
-- if grid lines is disabled, they appear anyway in the first frame (then disappear)
-
 - changing options mid-game has no effect in most cases, even after a restart
 
-- RLE file loading works but pattern is barely visible
+- RLE file loading works, but if world is larger than screen, center is invisible.
 
 - Statefile loading does not work correclty anymore. With larger grids
   everything  is empty.  With square  grids part  of the  grid is  cut
   off. Smaller grids load though
   
-- Same thing  with RLE files: with smaller grid  size, RLE file shows,
-  but with larger (or default) grid size, its invisible
-  
--  gridlines  vanish  if  starting  in menu  mode,  after  starting  a
-  game.  They are  there in  all manual  modes and  on startup  before
-  leaving the menu

config.go

@@ -205,7 +205,7 @@ func ParseCommandline() (*Config, error) {
 	pflag.BoolVarP(&config.ShowVersion, "version", "v", false, "show version")
 	pflag.BoolVarP(&config.Paused, "paused", "p", false, "do not start simulation (use space to start)")
 	pflag.BoolVarP(&config.Debug, "debug", "d", false, "show debug info")
-	pflag.BoolVarP(&config.ShowGrid, "show-grid", "g", true, "draw grid lines")
+	pflag.BoolVarP(&config.ShowGrid, "show-grid", "g", false, "draw grid lines")
 	pflag.BoolVarP(&config.Empty, "empty", "e", false, "start with an empty screen")
 	pflag.BoolVarP(&config.Invert, "invert", "i", false, "invert colors (dead cell: black)")
 	pflag.BoolVarP(&config.ShowEvolution, "show-evolution", "s", false, "show evolution traces")