5.0.0-RC1

Version 5 is a complete code rewrite.

• JWT support
• PSR-7 support
• Improved exception errors
• Replace all occurrences of the term "Storage" with "Repository"
• Simplify repositories
• Entities conform to interfaces and use traits
• Auth code grant updated
  • Allow support for public clients
  • Add support for #439
• Client credentials grant updated
• Password grant updated
  • Allow support for public clients
• Refresh token grant updated
• Implement Implicit grant
• Bearer token output type
• Remove MAC token output type
• Authorization server rewrite
• Resource server class moved to PSR-7 middleware
• Tests
• Much much better documentation