Version 2.0.0 beta 1

Version 1.x incompatible.

Changelog since version 2.0-alpha:

• Support for the NoIndex directive
• cURL now replaces GuzzleHttp
• Cache and UriClient classes now supports all available protocols
• No longer lists empty user-agents.
• Directive aliases (for simple typos / errors).
• Retry after HTTP header support.
• Improved Status-code handler, no longer throws exceptions on strange codes.
• Improved multi-User-agent directive handler.
• Host directive now also supports URL redirect host as fallback
• Tons of code optimizions
• Refactoring
• Documentation