Mongoose 5.3

Changes in Libmongoose library:

• Moved to the evented API. Updated API documentation is at
  http://cesanta.com/docs/Embed.shtml
  http://cesanta.com/docs/API.shtml
• Added MG_LUA event for exporting custom variables to the Lua environment
• Added virtual hosts capability, see url_rewrites option description at
  http://cesanta.com/docs/Options.shtml
• Added mjpg serving example
• Cleaned up and documented HTTP client API, with unit tests
• Added mg_wakeup_server() to awaken mg_poll_server()
  from another thread
• Moved Mongoose IO core to [https://github.com/cesanta/net_skeleton](Net Skeleton)
• Added connection hexdump functionality for developers
• Bug fixes

Changes in pre-compiled binaries:

• New awesome Mongoose logos by our designer Katrin - thanks Katrin!
  Check them out at http://cesanta.com/products.shtml
• Added Lua Server Pages support to the free version, quick intro is at
  http://cesanta.com/docs/Lua.shtml
• Added quick "Set shared directory" menu item to set document_root
• Added SSI support to the Pro version
• Removed SSL support from the Pro version