Add notice to readme and remove badges

README.md

@@ -1,11 +1,10 @@
 [![Neat](http://images.thoughtbot.com/bourbon/neat-logo.svg)](http://neat.bourbon.io)
 
-[![Gem Version](http://img.shields.io/gem/v/neat.svg?style=flat)](https://rubygems.org/gems/neat) [![Travis](http://img.shields.io/travis/thoughtbot/neat.svg?style=flat)](https://travis-ci.org/thoughtbot/neat)
-[![Gitter](http://img.shields.io/badge/gitter-neat-ae3dd2.svg?style=flat)](https://gitter.im/thoughtbot/neat)
-[![Stack Overflow](http://img.shields.io/badge/stack%20overflow-neat-ae3dd2.svg?style=flat)](http://stackoverflow.com/questions/tagged/neat)
-
 ## A lightweight, semantic grid framework
 
+**Note: This branch is an archive of Neat v1. The current release is v2 on
+`master`.**
+
 Neat is a fluid grid framework with the aim of being easy enough to use out of the box and flexible enough to customize down the road.
 
 - **[Demo](http://neat.bourbon.io)**