Merge pull request #719 from varvet/kbs/add-documentation-note-to-README

Add note about GitHub documentation being more recent than what's released

README.md

@@ -11,7 +11,7 @@ scalable authorization system.
 
 Links:
 
-- [API documentation](http://www.rubydoc.info/gems/pundit)
+- [API documentation for the most recent version](http://www.rubydoc.info/gems/pundit)
 - [Source Code](https://github.com/varvet/pundit)
 - [Contributing](https://github.com/varvet/pundit/blob/master/CONTRIBUTING.md)
 - [Code of Conduct](https://github.com/varvet/pundit/blob/master/CODE_OF_CONDUCT.md)
@@ -22,6 +22,8 @@ Sponsored by:
 
 ## Installation
 
+> **Please note** that the README on GitHub is accurate with the _latest code on GitHub_. You are most likely using a released version of Pundit, so please refer to the [documentation for the latest released version of Pundit](https://www.rubydoc.info/gems/pundit).
+
 ``` ruby
 gem "pundit"
 ```