[ANN] shoes 4 preview released

Hello fellow JRubyists,

we just released shoes 4.0.0.pre1 which is the new version of shoes
(just in time for the second birthday of the project):

What is shoes?
Shoes is a small little GUI toolkit to easily build graphical user
interfaces in Ruby :slight_smile:

Shoes 4 is more modular than the old shoes and all Ruby. Its first and
default backend is JRuby + SWT, which is why I write you :slight_smile:

Would be really happy if you tried it out!

Full release blog post:

Also a note of thanks to the JRuby community. You were warm and
welcoming when we decided writing shoes4 with JRuby and helped us choose
between SWT and Swing. Also we got 3 Google Summer of Code spots (one
for myself!) and in general a whole lot of help. And of course without
the seamless JRuby ↔ Java integration none of this would have been as
easy as it is right now.

So… thanks and shoes on!