Added new "Layers" section to obsolete and orphan

notes/arch.md

 
 
 
+Layers
+------
+
+    DAL         | BLL           | PL
+    ========================================
+    Repo        : Master        :
+                :               :
+                : Slave         :
+                :               :
+                : Condition     :
+                :               :
+                :               :