Add missing design patterns

[basherr]

Design Patterns implemented or otherwise to be included.

Creational

• Abstract Factory
• Factory Method
• Builder
• Prototype
• Singleton
• Pool
• Prototype
• Simple Factory
• Static Factory

Structural

• Adapter
• Data Mapper
• Facade
• Bridge
• Composite
• Decorator
• Dependency Injection
• Fluent Interface
• Flyweight
• Proxy
• Registry

Behavioral

• Chain Of Responsibilities
• Command
• Iterator
• Mediator
• Memento
• Null Object
• Observer
• Specification
• State
• Strategy
• Template Method
• Visitor

More

• Service Locator
• Repository
• Entity-Attribute-Value (EAV)