Added scale and offset parameters to LayoutAddCommand.
- Also, allow dot (.) to be used as a token for null.

Change-Id: Ic04e9624c03f7f45b14b0ec8a209b6804f6333c4
diff --git a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayout.java b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayout.java
index 45fdb80..9c55b7d 100644
--- a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayout.java
+++ b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayout.java
@@ -27,7 +27,7 @@
  * Represents a specific "subset" of the UI model of the network topology
  * that a user might wish to view. Backed by a {@link Region}.
  * <p>
- * These instances include information about which geo-map (or sprite definition)
+ * These instances include information about which geo-map or grid-layout
  * should be displayed, along with zoom and offset parameters.
  */
 public class UiTopoLayout {