Update the project to include at least 6 patterns

[liusbl]

• [x] Singleton (PlayerStorage)
• [x] Factory
• [x] Abstract Factory
• [ ] Strategy
• [x] Observer (SignalR)
• [x] Builder
• [ ] Adapter
• [x] Prototype
• [ ] Decorator
• [ ] Command
• [ ] Facade
• [ ] Bridge

[MantasGra]

Currently implementing AbstractFactory and Builder through #6. Should have a pull request ready by tomorrow.