• Added "redirect to SSL port" functionality, e.g. if you specify
  -listening_ports 8080r,8043s
  then all requests to HTTP port 8080 will be redirected to HTTPS port 8043
• Added mg_download() API, an HTTP client interface!
• Lua server pages now must output HTTP headers -- full control for Lua
• Added pre-built binary for MacOS, with initial GUI support
• API change: got rid of events, moved to struct mg_callbacks
• Bugfixes, thanks to contributors