add simple explanation about creational

Author: tonicospinelli

Creational/README.md

@@ -1,5 +1,11 @@
 # Creational
 
+In software engineering, creational design patterns are design patterns that
+deal with object creation mechanisms, trying to create objects in a manner
+suitable to the situation. The basic form of object creation could result in
+design problems or added complexity to the design. Creational design patterns
+solve this problem by somehow controlling this object creation.
+
 * [AbstractFactory](AbstractFactory) [:notebook:](http://en.wikipedia.org/wiki/Abstract_factory_pattern)
 * [Builder](Builder) [:notebook:](http://en.wikipedia.org/wiki/Builder_pattern)
 * [FactoryMethod](FactoryMethod) [:notebook:](http://en.wikipedia.org/wiki/Factory_method_pattern)