Enhanced cell & cells tools.
Provided initial sketch of the Annotated concept for the model attributes.
diff --git a/tools/test/cells/single b/tools/test/cells/single
new file mode 100644
index 0000000..bc969f3
--- /dev/null
+++ b/tools/test/cells/single
@@ -0,0 +1,6 @@
+# Local VirtualBox-based single ONOS instance & ONOS mininet box
+
+export ONOS_NIC=192.168.56.*
+export OC1="192.168.56.101"
+export OCN="192.168.56.103"
+