issue #333 diagrams and index added

factory-kit/index.md

@@ -10,21 +10,18 @@ tags:
  - Functional
 ---
 
-## Also known as
-Virtual Constructor
-
 ## Intent
 Define factory of immutable content with separated builder and factory interfaces.
 
-![alt text](./etc/factory-kit_1.png "Factory Kit")
+![alt text](./etc/factory-kit.png "Factory Kit")
 
 ## Applicability
 Use the Factory Kit pattern when
 
 * a class can't anticipate the class of objects it must create
-* you just want a new instance of custom builder instead of global one
-* a class wants its subclasses to specify the objects it creates
-* classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate
+* you just want a new instance of a custom builder instead of the global one
+* you explicitly want to define types of objects, that factory can build
+* you want a separated builder and creator interface
 
 ## Credits