Serverino v0.7.17 is here!

[Andrea Fontana]

Hi everyone,

I've just released serverino 0.7.17, with several improvements. 
Here are a couple of highlights:

**Hot reload just got smarter.**
You can now gracefully reload all workers without losing any 
active or queued requests. This means you can deploy updated 
worker code and have it take effect *immediately without 
interrupting your server*.

  * On POSIX systems, send SIGUSR1 to the server process: `kill 
-SIGUSR1 <server_pid>`

  * On Windows, serverino watches for a temporary canary file — 
just delete it to trigger a reload.

Even better: if you enable config.enableWorkersAutoReload(), 
serverino will automatically restart workers whenever the 
executable is recompiled, again without interrupting any 
in-flight requests. Watch auto-reload in action in this [video on 
youtube](https://www.youtube.com/watch?v=708oeTiifMw).

**KQueue is now the default backend on macOS.**
It has been available for a while on both macOS and Linux, but 
it's now officially the default on macOS (on linux *epoll* is set 
as default backend)

Fastest way to test serverino:
```
dub init -t serverino blah
cd blah
dub
```

More info, docs, examples on 
[github](https://github.com/trikko/serverino)


Andrea