added ambient_occlusion global scene option to parser and vim keywords; added ambient_occlusion scene file

git-svn-id: svn://anubis/fart/trunk@263 7f9b0f55-74a9-4bce-be96-3c2cd072584d

scenes/ambient_occlusion.fart

@@ -0,0 +1,41 @@
+
+scene
+{
+    options
+    {
+        multisample 3
+        width 800
+        height 600
+        ambient_occlusion 5
+    }
+
+    camera
+    {
+        position <2, -3, 2>
+        look_at <0, 0, 1>
+        up <0, 0, 1>
+    }
+
+    light
+    {
+        position <200, -10, 50>
+    }
+
+    define material white
+    {
+        color <1, 1, 1>
+    }
+
+    sphere
+    {
+        radius 1
+        material white
+        translate <0, 0, 1>
+    }
+    
+    plane
+    {
+        position <0, 0, 1>, 0
+        material white
+    }
+}