added grid.png, .hgignore, made ground green

.hgignore

@@ -0,0 +1 @@
+glob:*.swp

anaglymtd.lua

@@ -3,7 +3,7 @@ ag.import("std")
 
 function init_event()
     ground = std.createPlanePointNormal(0, 0, 0, 0, 0, 1)
-    ground:setColor(0, 0, 1)
+    ground:setColor(0, 1, 0)
 
     ag.setCamera(2, -12, 10)
 end