update compatibility notes

Author: yaroot

README.md

@@ -11,8 +11,8 @@ Notes:
   description, there's no way to provide handy link automatically for
   now
 - only tested in standalone mode
-- might be incompatible with absolute urls if you are using github
-  pages already
+- might be incompatible with absolute urls (eg: you use github project
+  pages and assume your pages will aways live under `/<project/`)
 
 Installation: