added ag.setCursorVisible() and ag.getCursorVisible()

git-svn-id: svn://anubis/anaglym/trunk@248 99a6e188-d820-4881-8870-2d33a10e2619

tests/managed_objects.lua

@@ -52,5 +52,7 @@ function key_down_event(key)
         --     { x = 0, y = 0, z = 1, vel = 0, fmax = 0 })
         -- local x, y, z = box:getPosition()
         -- box:setPosition(x, y, 2)
+    elseif (key == "minus") then
+        ag.setCursorVisible(not ag.getCursorVisible())
     end
 end