chickadee 0.5.0 released

[Thompson, David]

Hi everyone,

I just released chickadee 0.5.0. Chickadee is a general-purpose game
programming library for Guile.

Release notes, download links, and more project information can be
found in the full release announcement:
https://dthompson.us/chickadee-050-released.html

The covid-19 lockdown here in the US has given me a bit of extra time
to make this release and yesterday's guile-sdl2 release ahead of the
spring Lisp game jam happening over on itch.io.  I don't know if I
will submit a game jam entry, but if I do I will share it here.  If
you're interested in the jam, you can participate here:
https://itch.io/jam/spring-lisp-game-jam-2020

- Dave