readme.md: added donation request

dg · dg · commit 3cf88781a05e · 2018-06-22T11:34:04.000+02:00
diff --git a/readme.md b/readme.md
@@ -20,6 +20,8 @@ RobotLoader is a tool that gives you comfort of automated class loading for your
 
 RobotLoader is extremely comfortable and addictive!
 
+If you like Nette, **[please make a donation now](https://nette.org/donate)**. Thank you!
+
 So we can forget about those famous code blocks:
 
 ```php
