updated readme

README.md

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 [![Build Status](https://travis-ci.org/source-foundry/Hack.svg?branch=master)](https://travis-ci.org/source-foundry/Hack) [![Contributors](https://img.shields.io/badge/contributors-121-orange.svg?style=flat)](https://github.com/source-foundry/Hack/blob/master/docs/CONTRIBUTORS.md)
 
+Hack v3 is here!  [Click here to learn what's new](https://medium.com/source-words/hack-typeface-v3-6943991c1a80).
+
 ### A typeface designed for source code
 
 Hack is designed to be a workhorse typeface for source code. It has deep roots in the free, open source typeface community and expands upon the contributions of the [Bitstream Vera](https://www.gnome.org/fonts/) & [DejaVu](http://dejavu-fonts.org/wiki/Main_Page) projects.  The large x-height + wide aperture + low contrast design make it legible at commonly used source code text sizes with a sweet spot that runs in the 8px - 14px range.  The full set of changes to the upstream source are available in the [changelog](CHANGELOG.md).