Fore!

• Feature: Added ChildProcess to run async child processes within the event loop (@jmikola)
• Feature: [EventLoop] Added EventLoopInterface::nextTick(), implemented in all event loops (@jmalloc)
• Feature: [EventLoop] Added EventLoopInterface::futureTick(), implemented in all event loops (@jmalloc)
• Feature: [EventLoop] Added ExtEventLoop implementation using pecl/event (@jmalloc)
• BC break: [HttpClient] Drop unused Response::getBody()
• BC break: Bump minimum PHP version to PHP 5.4, remove 5.3 specific hacks
• BC break: Remove $loop argument from HttpClient: Client, Request, Response
• BC break: Update to React/Promise 2.0
• BC break: Update to Evenement 2.0
• BC break: [EventLoop] New method: EventLoopInterface::nextTick()
• BC break: [EventLoop] New method: EventLoopInterface::futureTick()
• Bug fix: [Dns] Properly resolve CNAME aliases
• Dependency: Autoloading and filesystem structure now PSR-4 instead of PSR-0