Version 2.4.1

• Fixed hooks documentation (it wasn't updated to 2.4 hooks)
• Fixed examples in controller wrappers registration (they weren't updated to 2.4)
• Error controller is now able to properly respond JSON when the client sends Accept: application/json even if the routed action didn't support it.
• Fixed crash when error controller is accessed directly without any error.
• Removed stray <p> tag in JSON responses from error controller.
• Replaced references to 2.3 with 2.4 in quickstarted apps