Fixed a bug in the implementation of a design pattern: Pool.
Corrected typo
Add link to Repository pattern
Update User.php
Merge pull request #96 from Shahelm/fix-bug-in-pool

Fixed a bug in the implementation of a design pattern: Pool.
Merge pull request #97 from gabrielbull/patch-1

Corrected typo
Merge pull request #98 from garoevans/patch-1

Add link to Repository pattern
Merge pull request #99 from dongww/master

Explicitely mark SplObserver as from root namespace