added logging, switched to slog, added screenshot, added release builder

README.md

@@ -5,6 +5,8 @@ floating  ones or  windows  in sub-containers.   So  it simulates  the
 behavior of other window managers  and desktop environments. Just bind
 the tool to `ALT-tab` and there you go.
 
+![Screenshot](https://github.com/TLINDEN/swaycycle/blob/main/.github/assets/screenshot.png)
+
 ## Installation
 
 Checkout the repo and execute `make`. You'll need the go toolkit. Then
@@ -18,6 +20,21 @@ Add such a line to your sway config file (e.g. in `$HOME/.config/sway/config`):
 bindsym $mod+Tab exec ~/bin/swaycycle
 ```
 
+## Debugging
+
+You may call `swaycycle` in a terminal window on a workspace with at
+least one another window to test it. Use the option `--debug (-d)` to
+get comprehensive debugging output. Add the option `--dump (-D)` to
+also get a dump of the sway data tree retrieved by swaycycle. You may
+also try `--verbose (-v)` to get a oneliner about the switch.
+
+It's also possible to debug an instance executed by sway using the
+`--logfile (-l)` switch, e.g.:
+
+```default
+bindsym $mod+Tab exec ~/bin/swaycycle -d -l /tmp/cycle.log
+```
+
 ## Getting help
 
 Although I'm happy to hear from swaycycle users in private email, that's the
@@ -25,7 +42,7 @@ best way for me to forget to do something.
 
 In order to report a bug,  unexpected behavior, feature requests or to
 submit    a    patch,    please    open   an    issue    on    github:
-https://github.com/TLINDEN/swaycycle/issues.
+https://github.com/tlinden/swaycycle/issues.
 
 ## Copyright and license
 
@@ -37,7 +54,7 @@ T.v.Dein <tom AT vondein DOT org>
 
 ## Project homepage
 
-https://github.com/TLINDEN/swaycycle
+https://github.com/tlinden/swaycycle
 
 ## Copyright and License