Re: GTK 3.20 Nim wrapper

[dom96]

As it happens, you can grab a printed version of [my 
book](https://manning.com/books/nim-in-action?a_aid=niminaction&a_bid=78a27e81) 
for half price using code `dotd121916`. (This expires in 7 hours though!).

Perhaps this would be affordable enough?