Add google calendar integration image

Author: bergercookie

docs/readme-tw-gcal.md

@@ -5,7 +5,9 @@
 > new synchronization has been created which synchronizes your Taskwarrior items
 > with Google Tasks TODO items which in the majority of cases should be more
 > suitable for you to use. To use the latter, head over to the
-> [TW ⬄  Google Tasks README](https://github.com/bergercookie/syncall/blob/master/docs/readme-tw-gtasks.md)
+> [TW ⬄ Google Tasks README](https://github.com/bergercookie/syncall/blob/master/docs/readme-tw-gtasks.md)
+
+![logo](../misc/meme-tw-gcal.png)
 
 ## Description