added README.rst to FlyweightFactory

Structural/Flyweight/README.rst

@@ -0,0 +1,51 @@
+`Flyweight`__
+==========
+
+Purpose
+-------
+
+To minimise memory usage, a Flyweight shares as much as possible memory with similar objects. It
+is needed when a large amount of objects is used that don't differ much in state. A common practice is
+to hold state in external data structures and pass them to the flyweight object when needed.
+
+UML Diagram
+-----------
+
+.. image:: uml/uml.png
+   :alt: Alt Facade UML Diagram
+   :align: center
+
+Code
+----
+
+You can also find these code on `GitHub`_
+
+FlyweightInterface.php
+
+.. literalinclude:: FlyweightInterface.php
+   :language: php
+   :linenos:
+
+CharacterFlyweight.php
+
+.. literalinclude:: CharacterFlyweight.php
+   :language: php
+   :linenos:
+
+FlyweightFactory.php
+
+.. literalinclude:: FlyweightFactory.php
+   :language: php
+   :linenos:
+
+Test
+----
+
+Tests/FlyweightTest.php
+
+.. literalinclude:: Tests/FlyweightTest.php
+   :language: php
+   :linenos:
+
+.. _`GitHub`: https://github.com/domnikl/DesignPatternsPHP/tree/master/Structural/Flyweight
+.. __: https://en.wikipedia.org/wiki/Flyweight_pattern