Added DataMapper files
move Singleton::$_instance into Singleton::getInstance() method
added DataMapper Example
some more code examples
some fixes on comments
A simple example for Observer Pattern
Update Test.php
Merge pull request #13 from Ti-webdev/master

Move Singleton::$_instance into Singleton::getInstance() method
Merge pull request #17 from scoumbourdis/cb4a9de3be436bb5ae1f1d9460dab449e137ae07

A simple example for Observer Pattern
fix tiny typo
Merge pull request #21 from greg0ire/patch-1

fix tiny typo
Merge pull request #19 from stakisko/master

Data Mapper Pattern Implementation
Merge pull request #14 from Trismegiste/master

Major improvement
Update Iterator.php
fix registry.php namespace bug
status pattern